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| All Patents in class 123/73CC | |||||
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| Number | Date | Patentee | Title | Type | |
| 297,329 | Apr. 22, 1884 | S.L. Wiegand | Gas Engine | gas and gasoline engines | |
| 541,773 | Jun. 25, 1895 | F.S. Mead | Gas Engine | internal combustion engines | |
| 582,073 | May 04, 1897 | F.S. Mead | Gas or Oil Engine | oil engines | |
| 620,941 | Mar. 14, 1899 | G.W. Lewis | Explosive Engine | gas and gasoline engines | |
| 634,529 | Oct. 10, 1899 | A. Lee | Gas Engine | gas and gasoline engines | |
| 640,675 | Jan. 02, 1900 | G.W. Lewis | Explosive Engine | gas and gasoline engines | |