| All Patents in class 123/188.2 |
Patents 1 -
15
of 49
      |
| Number | Date | Patentee | Title | Type |
| 27,677 | Apr. 03, 1860 | E. Armstrong | Steam Puppet Valve | steam engine valves |
| 67,659 | Aug. 13, 1867 | N.A. Otto, E. Langen | Gas Engine | gas and gasoline engines |
| 260,620 | Jul. 04, 1882 | C.M. Sombart | Gas Engine | gas and gasoline engines |
| 284,556 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine | gas and gasoline engines |
| 284,557 | Sep. 04, 1883 | G.M. Hopkins | Gas Engine | gas and gasoline engines |
| 316,868 | Apr. 28, 1885 | C. Benz | Gas Engine | gas and gasoline engines |
| 328,170 | Oct. 13, 1885 | J.S. Wood | Gas Engine | gas and gasoline engines |
| 398,108 | Feb. 19, 1889 | C.T. Wiedling | Gas Engine | gas and gasoline engines |
| 400,458 | Apr. 02, 1889 | A. Histon | Gas Engine | gas and gasoline engines |
| 418,417 | Dec. 31, 1889 | L.H. Nash | Gas Engine | gas and gasoline engines |
| 418,418 | Dec. 31, 1889 | L.H. Nash | Method of Operating Gas Engines | gas and gasoline engines |
| 432,260 | Jul. 15, 1890 | G.B. Brayton | Hydrocarbon Engine | |
| 444,031 | Jan. 06, 1891 | G.J. Weber | Gas Engine and Igniter Therefore | ignition systems |
| 448,989 | Mar. 24, 1891 | E. Narjot | Gas Engine | gas and gasoline engines |
| 457,460 | Aug. 11, 1891 | J.S. Connelly | Gas Motor | gas and gasoline engines |
