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| All Patents in class 60/39.821 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 269,146 | Dec. 12, 1882 | H. Wiedling | Gas Engine | ||
| 292,864 | Feb. 05, 1884 | J. Schweizer | Gas Motor Engine | ||
| 547,414 | Oct. 08, 1895 | J.J. Boardman | Gas Engine | ||
| 574,311 | Dec. 29, 1896 | J.W. Eisenhuth | Expansion Gas Engine | ||
| 642,949 | Feb. 06, 1900 | P.B. Verity, J.L. Baillie | Combustion Engine | ||
| 666,839 | Jan. 29, 1901 | H.L. Arnold | Internal Combustion Engine | ||
| 981,339 | Jan. 10, 1911 | E.C. Warren | Internal Combustion Pressure Generator | ||