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| All Patents in class 123/73D | |||||
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| Picture | Number | Date | Patentee | Title | |
| 577,536 | Feb. 23, 1897 | A. Peugeot | Oil Engine | ||
| 658,367 | Sep. 25, 1900 | E. Apperson, E. Haynes | Explosive Engine | ||
| 666,264 | Jan. 22, 1901 | J.F. Denison | Valve for Explosion Engines | ||
 | 713,792 | Nov. 18, 1902 | J.A. Ostenberg | Explosive Engine | |
| 1,136,488 | Apr. 20, 1915 | C.E. Sargent | Gas Driven Air Compressor | ||
| 1,451,407 | Apr. 10, 1923 | C.E. Sargent | Internal Combustion Engine | ||