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| All Patents in class 123/78A | |||||
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| Number | Date | Patentee | Title | Type | |
| 241,707 | May 17, 1881 | N.A. Otto | Gas Motor Engine | gas and gasoline engines | |
| 336,505 | Feb. 16, 1886 | J. Atkinson | Gas Engine | gas and gasoline engines | |
| 652,382 | Jun. 26, 1900 | J.H. Atterbury | Gas Engine | gas and gasoline engines | |
| 657,226 | Sep. 04, 1900 | M.F. Marmonier | Multiple-Piston Explosion-Motor | gas and gasoline engines | |
| 661,300 | Nov. 06, 1900 | F.L. Antisell, T.M. Antisell | Explosive-Gas Engine | gas and gasoline engines | |