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| All Patents in class 123/151 | |||||
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| Number | Date | Patentee | Title | Type | |
| 636,451 | Nov. 07, 1899 | J.W. Raymond | Gas-Engine | gas and gasoline engines | |
| 646,993 | Apr. 10, 1900 | C.A. Scott | Explosion Engine | gas and gasoline engines | |
| 657,810 | Sep. 11, 1900 | W.E. Cary | Gas Engine | gas and gasoline engines | |