| All Patents in class 123/190.4 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
 | 3,597 | May 25, 1844 | S. Perry | Manner of Constructing an Inflammable Gas or Vapor Engine |
| | 266,304 | Oct. 24, 1882 | P. Munzinger | Gas Engine |
 | 488,165 | Dec. 13, 1892 | E.W. Evans | Gas Engine |
 | 495,281 | Apr. 11, 1893 | F.E. Tremper | Explosive Engine |
| | 563,249 | Jul. 07, 1896 | H.C. Baker | Gas Engine |
| | 600,971 | Mar. 22, 1898 | P.E. Singer | Internal Combustion or Detonating Engine |
| | 646,993 | Apr. 10, 1900 | C.A. Scott | Explosion Engine |
| | 657,384 | Sep. 04, 1900 | S.F. Beetz | Explosive Engine |
| | 658,367 | Sep. 25, 1900 | E. Apperson, E. Haynes | Explosive Engine |
| | 666,264 | Jan. 22, 1901 | J.F. Denison | Valve for Explosion Engines |
