| All Patents in class 123/188.2 |
Patents 1 -
10
of 49
      |
| Picture | Number | Date | Patentee | Title |
| | 27,677 | Apr. 03, 1860 | E. Armstrong | Steam Puppet Valve |
| | 67,659 | Aug. 13, 1867 | N.A. Otto, E. Langen | Gas Engine |
| | 260,620 | Jul. 04, 1882 | C.M. Sombart | Gas Engine |
 | 284,556 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine |
 | 284,557 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine |
| | 316,868 | Apr. 28, 1885 | C. Benz | Gas Engine |
| | 328,170 | Oct. 13, 1885 | J.S. Wood | Gas Engine |
| | 398,108 | Feb. 19, 1889 | C.T. Wiedling | Gas Engine |
 | 400,458 | Apr. 02, 1889 | A. Histon | Gas Engine |
 | 418,417 | Dec. 31, 1889 | L.H. Nash | Gas Engine |
