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| All Patents in class 123/90.22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 448,369 | Mar. 17, 1891 | D.S. Regan | Vapor Engine | gas and gasoline engines | |
| 1,022,177 | Apr. 02, 1912 | B. Brazelle | Internal-combustion motor | gas and gasoline engines | |
| 1,842,426 | Jan. 26, 1932 | C.D. Salisbury | Valve Gear for Internal Combustion Engines | valve gear | |