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| All Patents in class 123/86 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 456,284 | Jul. 21, 1891 | C.H. Paxson, P.T. Coffield | Gas Engine | ||
 | 525,358 | Sep. 04, 1894 | F.C. Olin | Gas Engine | |
| 552,332 | Dec. 31, 1895 | B.M. Turner, B.L. Rinehart | Gas Engine | ||
 | 569,386 | Oct. 13, 1896 | F.C. Olin | Gas Engine | |
| 586,511 | Jul. 13, 1897 | E.J. Pennington | Igniter for Explosive Engines | ||
| 600,754 | Mar. 15, 1898 | B.C. Van Duzen | Gas Engine | ||
| 1,189,660 | Jul. 04, 1916 | E.S. Bullard, V.H. Leiner | Internal Combustion Engine | ||