| All Patents in class 123/66 |
Patents 1 -
10
of 19
      |
| Picture | Number | Date | Patentee | Title |
| | 37,299 | Jan. 06, 1863 | H. Messer | Air Engine |
| | 241,707 | May 17, 1881 | N.A. Otto | Gas Motor Engine |
 | 270,203 | Jan. 09, 1883 | J. Charter | Gas Engine |
| | 276,749 | May 01, 1883 | C.W. Baldwin | Gas Engine |
 | 278,600 | May 29, 1883 | J. Robson | Gas Engine |
| | 286,030 | Oct. 02, 1883 | S. Marcus | Gas Engine |
| | 292,894 | Feb. 05, 1884 | J. Charter | Gas Engine |
| | 315,808 | Apr. 14, 1885 | T. McDonough | Gas Engine |
| | 406,807 | Jul. 09, 1889 | C. White, A.R. Middleton | Gas Engine |
 | 419,805 | Jan. 21, 1890 | C.W. Weiss | Thermo Dynamic Motor |
