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| All Patents in class 123/190.2 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 44,572 | Oct. 04, 1864 | S.L. Wiegand | Gas Engine | ||
| 253,406 | Feb. 07, 1882 | T. McAdoo | Gas Engine | ||
| 328,170 | Oct. 13, 1885 | J.S. Wood | Gas Engine | ||
| 332,312 | Dec. 15, 1885 | S. Wilcox | Air and Gas Engine | ||
| 396,022 | Jan. 08, 1889 | J.C. Beckfeld | Gas Engine | ||
| 497,239 | May 09, 1893 | W.W. Grant | Gas Engine | ||
| 590,080 | Sep. 14, 1897 | J.S. Walch | Explosive Gas Engine | ||
| 835,634 | Nov. 13, 1906 | F.C. Olin | Valve for Gas and Similar Engines | ||