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| All Patents in class 123/190.9 | |||||
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| Number | Date | Patentee | Title | Type | |
| 298,063 | May 06, 1884 | J.L. Bogert | Balanced rotary valve | steam engine valves | |
| 584,130 | Jun. 08, 1897 | F.C. Griswold | Gas Engine | gas and gasoline engines | |
| 873,963 | Dec. 17, 1907 | B.A. Slocum | Internal Combustion Engine | internal combustion engines | |
| 1,175,897 | Mar. 14, 1916 | A.E. Winckler | Rotary Valve for Explosive-Engines | valves | |