Charles Kettering: Automotive Innovator and Beyond

Charles Kettering was a prolific American inventor, engineer, and businessman whose innovations revolutionized the automotive industry. He developed the electric self-starter, leaded gasoline, and Duco paint, while also contributing to advancements in diesel engines and air conditioning. Kettering's work had a lasting impact on transportation, technology, and even healthcare, making him a true icon of American innovation.
American inventor, engineer and businessman
Charles Franklin Kettering
Kettering circa 1934
Born(1876 -08-29)August 29, 1876
Loudonville, Ohio
DiedNovember 25, 1958(1958-11-25) (aged 82)
Dayton, Ohio
EducationOhio State University
Spouse
Olive Leora Williams
(m. 1905)
ChildrenEugene Kettering
Parent(s)Jacob and Martha Kettering
Awards
  • Franklin Medal (1936)
  • Hoover Medal (1955)
  • IEEE Edison Medal (1958)

Charles Franklin Kettering (August 29, 1876 – November 25, 1958) sometimes known as Charles Fredrick Kettering was an American inventor, engineer, businessman, and the holder of 186 patents. He was a founder of Delco, and was head of research at General Motors from 1920 to 1947. Among his most widely used automotive developments were the electrical starting motor and leaded gasoline. In association with the DuPont Chemical Company, he was also responsible for the invention of Freon refrigerant for refrigeration and air conditioning systems. At DuPont he also was responsible for the development of Duco lacquers and enamels, the first practical colored paints for mass-produced automobiles. While working with the Dayton-Wright Company he developed the "Bug" aerial torpedo, considered the world's first aerial missile. He led the advancement of practical, lightweight two-stroke diesel engines, revolutionizing the locomotive and heavy equipment industries. In 1927, he founded the Kettering Foundation, a non-partisan research foundation, and was featured on the cover of Time magazine in January 1933.

Early life

Charles was born in Loudonville, Ohio, United States, the fourth of five children of Jacob Henry Kettering and Martha (Hunter) Kettering. Poor eyesight gave him headaches in school. After graduation he followed his sister Emma into a teaching position at Bunker Hill School. By all accounts he was an engaging and innovative teacher. He attracted students to evening scientific demonstrations on electricity, heat, magnetism, and gravity.

He took classes at The College of Wooster, before transferring to Ohio State University. He was a member of the Delta Upsilon fraternity. Eye problems forced him to withdraw, and he took a job as foreman of a telephone line crew. At first, the termination of his studies caused him to be depressed. Then he found ways to apply his electrical engineering skills on the job, and his spirits revived. He also met his future wife, Olive Williams. When his eye condition improved, he was able to return to his studies and graduated from OSU in 1904 with an electrical engineering degree.

Career

NCR

Kettering was hired directly out of school to head the research laboratory at National Cash Register (later known as NCR Corporation). Kettering invented an easy credit approval system, a precursor to today's credit cards, and the electric cash register in 1906, which made ringing up sales physically much easier for sales clerks. Kettering distinguished himself as a practical inventor. As he said, "I didn't hang around much with other inventors and the executive fellows. I lived with the sales gang. They had some real notion of what people wanted." During his five years at NCR, from 1904 to 1909, Kettering secured 23 patents for NCR. He attributed his success to a good amount of luck but added, "I notice the harder I work, the luckier I get."

The Barn Gang

Beginning in 1907, his NCR colleague Edward A. Deeds convinced Kettering to develop improvements for the automobile. Deeds and Kettering invited other NCR engineers, including Harold E. Talbott, to join them nights and weekends in their tinkering at Deeds's barn. They became known as the "Barn Gang," and Kettering was called Boss Ket. Their first goal was to find a replacement for the magneto.

Delco

In 1909, Kettering resigned from NCR to work full-time on automotive developments, and the group incorporated as Dayton Engineering Laboratories Company, or Delco.

The self-starter

The hand crank used to start early automobiles could kick back under some circumstances. Byron Carter, founder of Cartercar, died from complications after such an accident in Detroit's Belle Isle park. Henry M. Leland – the head of Cadillac – became determined to develop an electric self-starting device. When Leland's engineers failed to develop a self-starter small enough to be practical he consulted Kettering, and Delco developed a practical model by February 1911.

Automobile electrical system

Kettering's key insight lay in devising an electrical system performing the three functions it still serves in modern cars: starter; producer of spark for ignition; and source of current for lighting. Leland ordered 12,000 self-starters for his 1912 models; Delco had to then transition from its research and development activities to production. The invention won a Dewar Trophy in 1913.

Kettering helped found the Engineers Club of Dayton in 1914.

Flxible

Kettering on the cover of Time magazine in 1933

In 1914, Flxible Sidecar Company was incorporated with the help of Kettering, who then became president of the company and joined the board of directors. Kettering provided significant funding for the company in its early years, particularly after 1916, when Kettering sold his firm, the Dayton Engineering Laboratories Company (Delco), to United Motors Company for $2.5 million. Kettering continued to serve as president of Flxible until he became chairman of the board in 1940, a position that he held until his death in 1958.

General Motors

Delco was sold to General Motors in 1918, as part of United Motors. Delco became the foundation for the General Motors Research Corporation and Delco Electronics. Kettering became vice-president of General Motors Research Corporation in 1920 and held the position for 27 years.

Between 1918 and 1923, he led the research and development at GM's Dayton research laboratories to commercialize air-cooled engines for cars and trucks. They used fans forcing air across copper fins for heat dissipation. The commercialization, attempted between 1921 and 1923, was unsuccessful due to a combination of factors, nontechnical and technical. Air-cooled engines have had commercial success before and since, in various fields (small engines, aircraft, cars), but the historical moment of GM's "copper-cooled" automotive engine was inauspicious.

Leaded gas

Kettering's research in fuel was based on his belief that oil would be in short supply and additives would allow more efficient engines with higher compression. His "high percentage" solution was to mix ethanol with gasoline, while his "low percentage solution" looked for additives that would be added in small quantities to increase what later would be called the octane rating of gasoline. Thomas Midgley Jr. and Kettering identified tetraethyllead (TEL) in December 1921 as an additive that would eliminate engine knocking at a dilution of one thousand to one. While use of ethanol could not be patented, TEL's use as an additive could. Kettering and Midgley secured its patent and proceeded to promote the use of TEL as an additive instead of other options. Kettering became the first president of the newly founded Ethyl Corporation that started to produce TEL in 1923. One year later, he hired Robert A. Kehoe as the medical expert to proclaim that leaded gasoline was safe for humans. That its use was an ecological disaster leading to a global lead contamination was not acknowledged until many decades later.

Personal life

Kettering married Olive Williams of Ashland, Ohio, on August 1, 1905. Their only child, Eugene Williams Kettering, was born on April 20, 1908. Eugene W. Kettering joined Winton Engine in 1930, which was acquired by General Motors and was eventually incorporated into the General Motors Electro-Motive Division (EMD). The younger Kettering became a central figure in the development of the EMD 567 locomotive engine and the Detroit Diesel 6-71 engine, serving at EMD until his retirement in 1960.

Charles Kettering built a house, "Ridgeleigh Terrace", in 1914. According to local sources, this house was the first in the United States to have electric air conditioning. Ridgeleigh Terrace was the home of his son, Eugene Kettering, until his death. Eugene's wife, Virginia Kettering, lived in the house for many years, restoring and redecorating it. In the late 1990s, the house was seriously damaged in a fire, but it was rebuilt according to the original blueprints.

Some of his memorable quotations are: "It doesn't matter if you try and try and try again, and fail. It does matter if you try and fail, and fail to try again.", "Failures are finger posts on the road to achievement.", "My interest is in the future because I am going to spend the rest of my life there." .

Kettering died on November 25, 1958. After his death, his body lay in honor at the Engineers Club and then was interred in the mausoleum at Woodland Cemetery, Dayton, Ohio.

Legacy

Model of Kettering aerial torpedo on display at National Museum of the United States Air Force in Dayton, Ohio

Max D. Liston, one of Kettering's co-workers at GM, described him "one of the gods of the automotive field, particularly from an inventive standpoint." : 4  Liston quoted Kettering as advising him, "People won't ever remember how many failures you've had, but they will remember how well it worked the last time you tried it." : 7 

Kettering and Deeds had a lifelong business, professional and personal relationship. In 1914, recognizing that Dayton was among the leading industrial cities in the US because of the skilled engineers and technicians in the city, they founded the Engineers Club of Dayton and the Foreman's Club of Dayton, which later on became the National Management Association.

Kettering held 186 U.S. patents. He invented the all-electric starting, ignition, and lighting system for automobiles. Electric starters replaced crank (manual) starting of automobiles. First incorporated in the 1912 Cadillac, all-electric starting aided in the growth of the US auto industry by making the automobile easy for anyone to start. Other patents included a portable lighting system and an incubator for premature infants. His engine-driven generator was combined with storage batteries to form a "Delco Plant", providing an electrical power for farmsteads and other locations far from the electrical power grid.

In 1918 Kettering designed the "aerial torpedo", nicknamed the Kettering Bug. The 300 lb (136 kg) papier-mache missile had 12 foot (3.6 m) cardboard wings, and a 40 hp (30 kW) engine. It could carry 300 lbs (136 kg) of high explosives at 50 mph (80 km/h), and cost $400. The "Bug" is considered the first aerial missile, and lessons learned from the "Bug" led to development of the first guided missiles, as well as radio-controlled drones.

Kettering and colleagues' development of leaded gasoline ultimately caused the release of large quantities of lead into the atmosphere as a result of the combustion of leaded gasoline all over the world. Due to the neurotoxic effects of lead, leaded gasoline has been widely banned since the late 1990s. The development of Freon using CFCs has been implicated in the depletion of the ozone layer.

He developed the idea of Duco paint and helped develop diesel engines and ways to harness solar energy. He was a pioneer in the application of magnetism to medical diagnostic techniques.

His inventions, especially the electric automobile starter, made him wealthy. In 1945, he helped found what became the Memorial Sloan Kettering Cancer Center, based on the premise that American industrial research techniques could be applied to cancer research.[citation needed]. His son and daughter-in-law, Eugene and Virginia, created Kettering Medical Center in Ohio, as a tribute to Charles Kettering's life and his work in healthcare research.

On January 1, 1998, the former General Motors Institute changed its name to Kettering University to honor Kettering as a founder.

Awards

  • He was awarded the Franklin Medal in 1936.
  • He was awarded the Hoover Medal in 1955.
  • He was awarded the IEEE Edison Medal in 1958.

Honors

  • He was elected to the United States National Academy of Sciences in 1928.
  • He was elected to the American Philosophical Society in 1930.

Memorials

In 1998, GMI Engineering and Management Institute (formerly General Motors Institute), of Flint, Michigan, changed its name to Kettering University in honor of Kettering. His ideals, prowess, and belief in co-operative education continue there. Kettering is also remembered through the Memorial Sloan-Kettering Cancer Center, a cancer research and treatment center in New York City, and through the Kettering Health Network, which includes several hospitals and medical center campuses as well as Kettering College in Kettering, Ohio.

The city of Kettering, Ohio, a suburb of Dayton, was named after him when it was incorporated in 1955.

The former U.S. Army Air Service testing field, McCook Field, is now a Dayton park called Kettering Field.

Several U.S. public schools are named after him:

  • Charles F. Kettering Sr. High School in Detroit, Michigan
  • Charles F. Kettering High School in Waterford, Michigan
  • Charles F. Kettering Elementary School in Ypsilanti, Michigan
  • Charles F. Kettering Elementary School in Long Beach, California
  • Kettering Fairmont High School in Kettering, Ohio
  • Kettering Elementary School in Westland, Michigan (now closed and demolished)
  • The Department of Environmental Health at the University of Cincinnati is housed in the Kettering Lab

The endowed Olive Williams Kettering Chair of The College of Wooster Department of Music is named in honor of his wife.

The University of Dayton's engineering building, Kettering Labs, is named after him.

The Kettering Science center on the Ashland University campus in Ohio is named for him.

Kettering Hall at Wilmington College is named for him, also Kettering Hall of Science at Oberlin College.

At Antioch College, the 1929 Science Building he donated was not named after him (it is now the Arts and Science Building), but the school's 33.000-square-foot Charles F. Kettering Building was (the same being originally a research facility, now home to campus radio station WYSO), while the college's Olive Kettering Library was named after his wife.

Patents

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Patents Listing Charles F. Kettering as an Inventor
Patent ID Title Inventors Location
US-1760845-A Drive-shaft connection for motor-driven vehicles Charles F Kettering, Charles R Short https://patents.google.com/patent/US1760845A/en
US-2688056-A Humidistat Charles F Kettering, Frank J Roselandt https://patents.google.com/patent/US2688056A/en
CA-168156-A Electric system for engines Charles F. Kettering, Filliam A. Chryst https://patents.google.com/patent/CA168156A/en
US-1552170-A Weighing machine Charles F Kettering, Charles L Lee https://patents.google.com/patent/US1552170A/en
US-1707732-A Frame construction for automobile chassis Charles F Kettering, Charles R Short https://patents.google.com/patent/US1707732A/en
US-1607200-A Fuel-supply system Charles F Kettering, Charles L Lee https://patents.google.com/patent/US1607200A/en
US-1644731-A Internal-combustion engine Charles F Kettering, Charles R Short https://patents.google.com/patent/US1644731A/en
AU-656306-A Improvements in electric driving devices for cash registers Davion Montgomery Chio U. SA Charles F. Kettering https://patents.google.com/patent/AU656306A/en
US-1561083-A Vehicle frame Charles F Kettering https://patents.google.com/patent/US1561083A/en
US-1599899-A Diaphragm pump Charles F Kettering, George A Buvinger https://patents.google.com/patent/US1599899A/en
US-1718238-A System of gas control Charles F Kettering, William A Chryst https://patents.google.com/patent/US1718238A/en
US-1404152-A Fuel-supply system Charles F Kettering https://patents.google.com/patent/US1404152A/en
US-2417112-A Electrical control system Charles F Kettering https://patents.google.com/patent/US2417112A/en
US-1978463-A Refrigeration Charles F Kettering https://patents.google.com/patent/US1978463A/en
US-1721808-A Heat-exchange apparatus Charles F Kettering https://patents.google.com/patent/US1721808A/en
US-1453358-A Process of joining metals Charles F Kettering https://patents.google.com/patent/US1453358A/en
US-1795865-A Hydraulic slack adjuster Charles F Kettering https://patents.google.com/patent/US1795865A/en
US-1605663-A Motor fuel Charles F Kettering, Jr Thomas Midgley https://patents.google.com/patent/US1605663A/en
US-2159741-A Bed air conditioning apparatus Charles F Kettering, Edwin C Sittler https://patents.google.com/patent/US2159741A/en
US-2130092-A Refrigerating apparatus Charles F Kettering https://patents.google.com/patent/US2130092A/en
US-2543500-A Means for suppressing transverse modes of oscillation in a piezoelectric crystal Charles F Kettering, Wesley S Erwin https://patents.google.com/patent/US2543500A/en
US-2093968-A Refrigerating apparatus Charles F Kettering https://patents.google.com/patent/US2093968A/en
US-1430524-A Engine Charles F Kettering https://patents.google.com/patent/US1430524A/en
US-1624139-A Fuel-supply device Charles F Kettering https://patents.google.com/patent/US1624139A/en
US-1331649-A Ventilating system Charles F Kettering https://patents.google.com/patent/US1331649A/en
US-1668508-A Process of making air-cooled cylinders Charles F Kettering https://patents.google.com/patent/US1668508A/en
US-975533-A Store-service credit-system apparatus. Charles F Kettering https://patents.google.com/patent/US975533A/en
US-1529190-A Condenser Charles F Kettering https://patents.google.com/patent/US1529190A/en
US-2130093-A Refrigerating apparatus Charles F Kettering https://patents.google.com/patent/US2130093A/en
US-2399640-A Temperature sensitive means Charles F Kettering https://patents.google.com/patent/US2399640A/en
US-1122605-A Store-service credit-system apparatus. Charles F Kettering https://patents.google.com/patent/US1122605A/en
US-2563341-A Humidity control Charles F Kettering https://patents.google.com/patent/US2563341A/en
US-2760023-A Humidistat Charles F Kettering, Kauno E Sihvonen, Thomas C Van Degrift https://patents.google.com/patent/US2760023A/en
US-2432667-A Automatic control Charles F Kettering, Albert W Fischer https://patents.google.com/patent/US2432667A/en
US-2377633-A Variable pitch propeller control Charles F Kettering https://patents.google.com/patent/US2377633A/en
US-1137061-A Cash-register. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1137061A/en
US-1463958-A Magneto ignition system Charles F Kettering https://patents.google.com/patent/US1463958A/en
US-2080487-A Synchronous control of clutch servos Charles F Kettering https://patents.google.com/patent/US2080487A/en
US-2007608-A Two cycle engine Charles F Kettering https://patents.google.com/patent/US2007608A/en
US-1948818-A Method and means for making air cooled cylinders Charles F Kettering https://patents.google.com/patent/US1948818A/en
US-1464908-A Steering-post lock Charles F Kettering https://patents.google.com/patent/US1464908A/en
US-1293468-A Engine starting device. Charles F Kettering https://patents.google.com/patent/US1293468A/en
US-1231266-A Engine-starting device. Charles F Kettering https://patents.google.com/patent/US1231266A/en
US-1223180-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1223180A/en
US-959548-A Electric driving device for registering-machines. Charles F Kettering https://patents.google.com/patent/US959548A/en
US-1191976-A Current-interrupter. Charles F Kettering https://patents.google.com/patent/US1191976A/en
US-1635216-A Method and means for using low-compression fuels Charles F Kettering, Jr Thomas Midgley https://patents.google.com/patent/US1635216A/en
US-2377698-A Automatic control Charles F Kettering, Albert W Fischer https://patents.google.com/patent/US2377698A/en
US-1529191-A Magnetic clutch Charles F Kettering https://patents.google.com/patent/US1529191A/en
US-910690-A Driving mechanism for registering-machines. Charles F Kettering https://patents.google.com/patent/US910690A/en
US-1338987-A System of electrical generation and control Charles F Kettering https://patents.google.com/patent/US1338987A/en
US-1663709-A Cooling device for valves and the like Charles F Kettering https://patents.google.com/patent/US1663709A/en
US-1066432-A Control for electric-lighting systems. Charles F Kettering https://patents.google.com/patent/US1066432A/en
US-2098295-A Method of and apparatus for creating an artificial fever Charles F Kettering, Edwin C Sittler https://patents.google.com/patent/US2098295A/en
US-1231264-A Ignition device. Charles F Kettering https://patents.google.com/patent/US1231264A/en
US-1623121-A Control apparatus Charles F Kettering https://patents.google.com/patent/US1623121A/en
US-1037492-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1037492A/en
US-1664366-A Fuel-supply system Charles F Kettering https://patents.google.com/patent/US1664366A/en
US-1167762-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1167762A/en
US-1150523-A Engine-starting device. Charles F Kettering https://patents.google.com/patent/US1150523A/en
US-2407555-A Automatic control Charles F Kettering https://patents.google.com/patent/US2407555A/en
US-1710991-A Automatically-controlled transmission for motor vehicles Charles F Kettering https://patents.google.com/patent/US1710991A/en
US-1144418-A Cash-register. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1144418A/en
US-2458784-A Automatic control Charles F Kettering, Albert W Fischer https://patents.google.com/patent/US2458784A/en
US-1650524-A Electrical apparatus Charles F Kettering https://patents.google.com/patent/US1650524A/en
US-923857-A Mechanical clutch. Charles F Kettering https://patents.google.com/patent/US923857A/en
US-1380974-A Internal-combustion engine Charles F Kettering https://patents.google.com/patent/US1380974A/en
US-1507293-A Cylinder construction Charles F Kettering, William B Earnshaw https://patents.google.com/patent/US1507293A/en
US-1815315-A Refrigerating apparatus Charles F Kettering https://patents.google.com/patent/US1815315A/en
US-1886339-A Refrigerating apparatus Charles F Kettering https://patents.google.com/patent/US1886339A/en
US-1410682-A Fuel-supply device Charles F Kettering https://patents.google.com/patent/US1410682A/en
US-1793857-A Refrigerating apparatus Charles F Kettering, Otto M Summers https://patents.google.com/patent/US1793857A/en
US-1512029-A Water system Charles F Kettering, George A Buvinger https://patents.google.com/patent/US1512029A/en
US-1243422-A Engine-starting system. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1243422A/en
US-1511201-A Internal-combustion engine Charles F Kettering https://patents.google.com/patent/US1511201A/en
US-1170275-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1170275A/en
US-1650523-A Electrical apparatus Charles F Kettering, Joseph C Federle https://patents.google.com/patent/US1650523A/en
US-1557206-A Fuel-supply device Charles F Kettering https://patents.google.com/patent/US1557206A/en
US-1255177-A Ignition system for combustion-engines. Charles F Kettering https://patents.google.com/patent/US1255177A/en
US-1434013-A Engine-control system Charles F Kettering https://patents.google.com/patent/US1434013A/en
US-1116440-A Indicating mechanism. Charles F Kettering https://patents.google.com/patent/US1116440A/en
US-2456198-A Control Charles F Kettering, Albert W Fischer https://patents.google.com/patent/US2456198A/en
US-1046605-A Electric railway-gate. Charles F Kettering https://patents.google.com/patent/US1046605A/en
US-1508700-A Protecting device Charles F Kettering https://patents.google.com/patent/US1508700A/en
US-1507292-A System of gas control Charles F Kettering, William A Chryst https://patents.google.com/patent/US1507292A/en
US-1183074-A Engine-starting device. Charles F Kettering https://patents.google.com/patent/US1183074A/en
US-1783921-A Container for removing carbon Charles F Kettering https://patents.google.com/patent/US1783921A/en
US-1336143-A Circuit-breaker indicating device Charles F Kettering https://patents.google.com/patent/US1336143A/en
US-1272056-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1272056A/en
US-1168314-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1168314A/en
US-1004881-A Cash-register. Charles F Kettering https://patents.google.com/patent/US1004881A/en
US-1697818-A Air-cooled engine Charles F Kettering https://patents.google.com/patent/US1697818A/en
US-1142102-A Store-service credit-system apparatus. Charles F Kettering https://patents.google.com/patent/US1142102A/en
US-1089771-A Binding-post. Charles F Kettering https://patents.google.com/patent/US1089771A/en
US-1913887-A Motor starting device Charles F Kettering, Orin E Marvel https://patents.google.com/patent/US1913887A/en
US-1605664-A Motor fuel Charles F Kettering, Jr Thomas Midgley https://patents.google.com/patent/US1605664A/en
US-1529188-A Internal-combustion engine Charles F Kettering https://patents.google.com/patent/US1529188A/en
US-1258785-A Engine-starting system. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1258785A/en
US-1665307-A Cooling system for internal-combustion engines Charles F Kettering https://patents.google.com/patent/US1665307A/en
US-1448749-A Electrical system Charles F Kettering https://patents.google.com/patent/US1448749A/en
US-1041802-A Recording-key. Charles F Kettering https://patents.google.com/patent/US1041802A/en
US-924616-A Driving mechanism for cash-registers. Charles F Kettering https://patents.google.com/patent/US924616A/en
US-1254811-A Engine starting, lighting, and ignition system. Charles F Kettering https://patents.google.com/patent/US1254811A/en
US-1284365-A Electric machine. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1284365A/en
US-1259995-A System of selective electrical distribution. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1259995A/en
US-1102593-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1102593A/en
US-1005555-A Cash-register. Charles F Kettering https://patents.google.com/patent/US1005555A/en
US-1163092-A Timer or current-interrupter. Charles F Kettering https://patents.google.com/patent/US1163092A/en
US-1108185-A Store-service-credit-system apparatus. Charles F Kettering https://patents.google.com/patent/US1108185A/en
US-1040349-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1040349A/en
US-1233370-A Control for electrical systems. Charles F Kettering https://patents.google.com/patent/US1233370A/en
US-1225820-A Electric switch. Charles F Kettering, Robert S De Maree https://patents.google.com/patent/US1225820A/en
US-1501853-A System of electrical generation Charles F Kettering, William A Chryst https://patents.google.com/patent/US1501853A/en
US-1265454-A Ignition system. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1265454A/en
US-1501561-A Engine construction Charles F Kettering https://patents.google.com/patent/US1501561A/en
US-1131246-A Illuminated cash-register indicator. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1131246A/en
US-1110392-A Cash-register. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1110392A/en
US-1196243-A Engine-starting device. Charles F Kettering https://patents.google.com/patent/US1196243A/en
US-1109763-A Registering mechanism. Charles F Kettering https://patents.google.com/patent/US1109763A/en
US-1405519-A Brush mounting Charles F Kettering, William A Chryst https://patents.google.com/patent/US1405519A/en
US-1514970-A Hydrometer Charles F Kettering https://patents.google.com/patent/US1514970A/en
US-1337363-A Systrm of electrical distribution and control Charles F Kettering https://patents.google.com/patent/US1337363A/en
US-1690341-A Air cleaner Charles F Kettering https://patents.google.com/patent/US1690341A/en
US-2150880-A Control means for refrigerating apparatus Charles F Kettering https://patents.google.com/patent/US2150880A/en
US-1241990-A Engine-starting device. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1241990A/en
US-1151190-A Multiple cash register and recorder. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1151190A/en
US-1622154-A Electrical system for automotive vehicles Charles F Kettering, John H Hunt https://patents.google.com/patent/US1622154A/en
CA-131319-A Cash register William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA131319A/en
US-1211378-A System of selective electrical distribution. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1211378A/en
US-1253389-A Ignition system. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1253389A/en
US-1585994-A Water system Charles F Kettering, George A Buvinger https://patents.google.com/patent/US1585994A/en
US-1231265-A Control for electrical systems. Charles F Kettering https://patents.google.com/patent/US1231265A/en
US-1025277-A Cash-register. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1025277A/en
US-1642034-A System of electrical distribution and control Charles F Kettering, William A Chryst https://patents.google.com/patent/US1642034A/en
US-1190175-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1190175A/en
US-1698265-A Water system Charles F Kettering, George A Buvinger https://patents.google.com/patent/US1698265A/en
US-1435966-A Ignition system Charles F Kettering https://patents.google.com/patent/US1435966A/en
US-1192906-A Current-interrupter. Charles F Kettering https://patents.google.com/patent/US1192906A/en
US-1162073-A Current-interrupter. Charles F Kettering https://patents.google.com/patent/US1162073A/en
US-1465644-A Ignition apparatus Charles F Kettering, William A Chryst https://patents.google.com/patent/US1465644A/en
US-1441430-A Hydrometer circuit closer Charles F Kettering https://patents.google.com/patent/US1441430A/en
US-1273870-A Engine starting device. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1273870A/en
US-1240348-A Engine-starting device. Charles F Kettering https://patents.google.com/patent/US1240348A/en
US-1557205-A Automatic switch Charles F Kettering https://patents.google.com/patent/US1557205A/en
US-939267-A Store-service credit-system apparatus. Charles F Kettering https://patents.google.com/patent/US939267A/en
US-1401337-A Electrical system for engines Charles F Kettering, William A Chryst https://patents.google.com/patent/US1401337A/en
US-959059-A Adding and subtracting machine. Charles F Kettering https://patents.google.com/patent/US959059A/en
US-1011966-A Cash-register. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1011966A/en
US-1166527-A Registering mechanism. Charles F Kettering https://patents.google.com/patent/US1166527A/en
US-1336142-A Circuit-breaker indicating device Charles F Kettering https://patents.google.com/patent/US1336142A/en
US-1233369-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1233369A/en
US-1273871-A Engine starting system. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1273871A/en
US-1284707-A Electrical storage system. Charles F Kettering https://patents.google.com/patent/US1284707A/en
US-1501491-A Spark plug Charles F Kettering https://patents.google.com/patent/US1501491A/en
US-1250188-A Engine-starting system. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1250188A/en
US-1272055-A Electrical system for engines. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1272055A/en
US-1489324-A Internal-combustion engine Charles F Kettering https://patents.google.com/patent/US1489324A/en
US-1137062-A Cash and autographic register. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1137062A/en
CA-169225-A Ignition system Charles F. Kettering https://patents.google.com/patent/CA169225A/en
US-1293467-A System of selective electrical distribution. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1293467A/en
US-1501852-A Engine-starting system Charles F Kettering https://patents.google.com/patent/US1501852A/en
US-1184858-A Engine-starting device. Charles F Kettering https://patents.google.com/patent/US1184858A/en
US-1644732-A Internal-combustion engine Charles F Kettering https://patents.google.com/patent/US1644732A/en
US-976577-A Driving device for registering-machines. Charles F Kettering https://patents.google.com/patent/US976577A/en
US-1337364-A System of electrical generation and control Charles F Kettering https://patents.google.com/patent/US1337364A/en
US-1154025-A Electric meter. Charles F Kettering https://patents.google.com/patent/US1154025A/en
US-1037491-A Ignition apparatus for explosion-motors. Charles F Kettering https://patents.google.com/patent/US1037491A/en
US-1301851-A Ignition system. Charles F Kettering https://patents.google.com/patent/US1301851A/en
US-1529189-A Internal-combustion engine Charles F Kettering https://patents.google.com/patent/US1529189A/en
US-1229754-A Electric machine. Charles F Kettering, William A Chryst https://patents.google.com/patent/US1229754A/en
CA-168155-A Electric starting system for engines William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA168155A/en
CA-157952-A Engine starting system Charles F. Kettering, William A. Chryst https://patents.google.com/patent/CA157952A/en
CA-157951-A Engine starter Charles F. Kettering, William A. Chryst https://patents.google.com/patent/CA157951A/en
CA-169991-A Engine starting system Charles F. Kettering, William A. Chryst https://patents.google.com/patent/CA169991A/en
CA-160277-A Control for electrical systems Charles F. Kettering https://patents.google.com/patent/CA160277A/en
CA-160276-A Control for electrical systems Charles F. Kettering https://patents.google.com/patent/CA160276A/en
CA-155575-A Starterm for electric machines William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA155575A/en
CA-146550-A Engine starting device Charles F. Kettering https://patents.google.com/patent/CA146550A/en
CA-143409-A Engine starting device Charles F. Kettering https://patents.google.com/patent/CA143409A/en
CA-188336-A Electrical power system Charles F. Kettering https://patents.google.com/patent/CA188336A/en
CA-172616-A Engine starting system William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA172616A/en
CA-143408-A Engine starting device Charles F. Kettering https://patents.google.com/patent/CA143408A/en
CA-162212-A Electrical distribution for engines William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA162212A/en
CA-109012-A Store service system Charles F. Kettering https://patents.google.com/patent/CA109012A/en
CA-146144-A Cash register William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA146144A/en
CA-143406-A Engine starting device Charles F. Kettering https://patents.google.com/patent/CA143406A/en
CA-143407-A Engine starting and lighting system Charles F. Kettering https://patents.google.com/patent/CA143407A/en
CA-146549-A Engine starting device Charles F. Kettering https://patents.google.com/patent/CA146549A/en
CA-162268-A Ignition system Charles F. Kettering https://patents.google.com/patent/CA162268A/en
CA-188335-A Electrical power system Charles F. Kettering https://patents.google.com/patent/CA188335A/en
CA-170373-A Registering mechanism Charles F. Kettering https://patents.google.com/patent/CA170373A/en
CA-123235-A Cash register William A. Chryst, Charles F. Kettering https://patents.google.com/patent/CA123235A/en
US-1454644-A Electric speedometer Charles F Kettering https://patents.google.com/patent/US1454644A/en
CA-168863-A Cash register Charles F. Kettering, William A. Chryst https://patents.google.com/patent/CA168863A/en
US-1191083-A Electric machine. Charles F Kettering https://patents.google.com/patent/US1191083A/en
CA-150641-A Ignition system Charles F. Kettering https://patents.google.com/patent/CA150641A/en
CA-226877-A Electric speedometer F. Kettering Charles https://patents.google.com/patent/CA226877A/en
CA-216052-A Engine starting system F. Kettering Charles https://patents.google.com/patent/CA216052A/en
CA-297618-A Refrigerating apparatus F. Kettering Charles https://patents.google.com/patent/CA297618A/en
CA-216053-A Cooling device for valves F. Kettering Charles https://patents.google.com/patent/CA216053A/en
CA-241995-A Electrical distribution F. Kettering Charles, A. Chryst William https://patents.google.com/patent/CA241995A/en
CA-216050-A Cooling device for valves F. Kettering Charles https://patents.google.com/patent/CA216050A/en
CA-242144-A Automatic switch F. Kettering Charles https://patents.google.com/patent/CA242144A/en
CA-235636-A Battery charging system F. Kettering Charles https://patents.google.com/patent/CA235636A/en
CA-235440-A System of electrical generation F. Kettering Charles https://patents.google.com/patent/CA235440A/en
CA-251507-A Water system F. Kettering Charles, A. Buvinger George https://patents.google.com/patent/CA251507A/en
CA-437435-A Variable pitch propeller control F. Kettering Charles https://patents.google.com/patent/CA437435A/en
CA-239777-A Water system A. Buvinger George, F. Kettering Charles https://patents.google.com/patent/CA239777A/en
CA-251326-A Motor fuel Thomas Midgley, Jr., F. Kettering Charles https://patents.google.com/patent/CA251326A/en
CA-241994-A System of electrical generation F. Kettering Charles, A. Chryst William https://patents.google.com/patent/CA241994A/en
CA-235441-A System of electrical generation F. Kettering Charles https://patents.google.com/patent/CA235441A/en
AU-656306-B Improvements in electric driving devices for cash registers F Kettering Davion Montgomery Chio U Sa Charles https://patents.google.com/patent/AU656306B/en