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| All Patents in class 123/196M | |||||
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| Number | Date | Patentee | Title | Type | |
| 296,340 | Apr. 08, 1884 | H.S. Maxim | Gas Engine | gas and gasoline engines | |
| 333,838 | Jan. 05, 1886 | L.P. Malandin, E. Delamare-Deboutteville | Gas Engine | gas and gasoline engines | |
| 620,602 | Mar. 07, 1899 | H.P. Maxim | Explosive Engine | gas and gasoline engines | |
| 632,814 | Sep. 12, 1899 | B.M. Bullock, J.D. Hay | Gas Engine | gas and gasoline engines | |
| 660,129 | Oct. 23, 1900 | P.H. Standish | Rotary Explosive-Motor | rotary engines | |