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| All Patents in class 92/212 | |||||
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| Number | Date | Patentee | Title | Type | |
| 155,087 | Sep. 15, 1874 | J. Hirsch | Hot Air Engines | hot air engines | |
| 595,497 | Dec. 14, 1897 | W. Rowbotham | Oil, Gas or Like Engine | oil engines | |
| 666,368 | Jan. 22, 1901 | H.F. Wallman | Internal Combustion Engine | internal combustion engines | |
| 2,059,713 | Nov. 03, 1936 | H. Schneider | Engine Piston | pistons | |