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| All Patents in class 261/94 | |||||
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| Number | Date | Patentee | Title | Type | |
| 376,212 | Jan. 10, 1888 | H.K. Shanck | Gas Engine | gas and gasoline engines | |
| 450,091 | Apr. 07, 1891 | L.G. Woolley | Vaporizer for Gas Engines | carburetors | |