| All Patents in class 123/68 |
Patents 1 -
10
of 65
      |
| Picture | Number | Date | Patentee | Title |
| | 44,572 | Oct. 04, 1864 | S.L. Wiegand | Gas Engine |
| | 118,028 | Aug. 15, 1871 | C.P. Leavitt | Improvement in Gas Engines |
 | 125,166 | Apr. 02, 1872 | G.B. Brayton | Improvement in Gas Engines |
 | 151,468 | Jun. 02, 1874 | G.B. Brayton | Gas Engines |
| | 222,660 | Dec. 16, 1879 | F. Bürger | Gas-Engine |
| | 225,778 | Mar. 23, 1880 | W. Hees, W. Wittig | Gas-Engine |
| | 230,470 | Jul. 27, 1880 | D. Clerk | Gas Motor Engine |
| | 233,804 | Oct. 26, 1880 | A.K. Rider | Gas Engine |
| | 241,707 | May 17, 1881 | N.A. Otto | Gas Motor Engine |
| | 243,795 | Jul. 05, 1881 | J. Robson | Gas Engine |
