| All Patents in class 123/18R |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 79,803 | Jul. 14, 1868 | J.S. Barden | Rotary Steam Engines | rotary steam engines |
| 103,212 | May 17, 1870 | H.E. Long | Rotary Steam Engine | steam engines |
| 128,062 | Jun. 18, 1872 | C.W. Patten | Improvment in Rotary Steam-Engines | rotary steam engines |
| 129,635 | Jul. 16, 1872 | W.I. Weed | Improvment in Rotary Engines | rotary steam engines |
| 370,258 | Sep. 20, 1887 | F.W. Crossley, H.P. Holt | Gas Motor Engine | gas and gasoline engines |
| 417,471 | Dec. 17, 1889 | W.E. Crist | Gas Engine | gas and gasoline engines |
| 487,313 | Dec. 06, 1892 | S. Withers, D.S. Covert | Gas Engine | gas and gasoline engines |
| 506,817 | Oct. 17, 1893 | D.D. Hobbs | Gas Engine | gas and gasoline engines |
| 602,707 | Apr. 19, 1898 | G.A. Newman | Explosive Engine | internal combustion engines |
| 613,417 | Nov. 01, 1898 | D.D. Hobbs | Gas Engine | gas and gasoline engines |
| 623,361 | Apr. 18, 1899 | J.H. Frew | Oscillating Gas or Steam Engine | gas and gasoline engines |
| 644,295 | Feb. 27, 1900 | W.F. Dial, J.G. Lepper | Vapor or Gas Engine | gas and gasoline engines |
| 651,741 | Jun. 12, 1900 | J.C. Anderson | Explosive Liquid-Air Engine | internal combustion engines |
| 2,389,764 | Nov. 27, 1945 | T.L. Chard | Oscillatory engine | |
