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| All Patents in class 123/90.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 582,620 | May 18, 1897 | J.A. Charter | Gas Engine | internal combustion engines | |
| 608,968 | Aug. 09, 1898 | W. Morava | Gas or Oil Motor for Bycycles | gas and gasoline engines | |
| 637,975 | Nov. 28, 1899 | E. Rappe | Gas Engine | gas and gasoline engines | |
| 640,674 | Jan. 02, 1900 | G.W. Lewis | Explosive Engine | gas and gasoline engines | |
| 645,293 | Mar. 13, 1900 | A. Heil | Gas Engine | ||
| 2,407,422 | Sep. 10, 1946 | F.G. Hobart | Engine Valve Mounting | valves | |