| All Patents in class 123/18R |
Patents 1 -
10
of 14
      |
| Picture | Number | Date | Patentee | Title |
| | 79,803 | Jul. 14, 1868 | J.S. Barden | Rotary Steam Engines |
| | 103,212 | May 17, 1870 | H.E. Long | Rotary Steam Engine |
| | 128,062 | Jun. 18, 1872 | C.W. Patten | Improvment in Rotary Steam-Engines |
| | 129,635 | Jul. 16, 1872 | W.I. Weed | Improvment in Rotary Engines |
 | 370,258 | Sep. 20, 1887 | F.W. Crossley, H.P. Holt | Gas Motor Engine |
| | 417,471 | Dec. 17, 1889 | W.E. Crist | Gas Engine |
| | 487,313 | Dec. 06, 1892 | D.S. Covert, S. Withers | Gas Engine |
| | 506,817 | Oct. 17, 1893 | D.D. Hobbs | Gas Engine |
| | 602,707 | Apr. 19, 1898 | G.A. Newman | Explosive Engine |
| | 613,417 | Nov. 01, 1898 | D.D. Hobbs | Gas Engine |
