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| All Patents in class 123/190.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 253,406 | Feb. 07, 1882 | T. McAdoo | Gas Engine | gas engines | |
| 328,170 | Oct. 13, 1885 | J.S. Wood | Gas Engine | gas engines | |
| 332,312 | Dec. 15, 1885 | S. Wilcox | Air and Gas Engine | gas engines | |
| 835,634 | Nov. 13, 1906 | F.C. Olin | Valve for Gas and Similar Engines | gas engines | |