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| All Patents in class 123/338 | |||||
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| Number | Date | Patentee | Title | Type | |
| 379,807 | Mar. 20, 1888 | J. Noble | Gas Engine | gas and gasoline engines | |
| 653,876 | Jul. 17, 1900 | F.C. Olin | Gas Engine | gas and gasoline engines | |
| 654,140 | Jul. 24, 1900 | R. Diesel | Apparatus for Regulating Fuel-Supply of Internal-Combustion Engines | fuel systems | |
| 659,944 | Oct. 16, 1900 | H.D. Weed | Gas Engine | gas and gasoline engines | |
| 2,669,982 | Feb. 23, 1954 | C.H. Schowalter | Ambient Air Control of Blower By-Passes | fuel systems | |