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| All Patents in class 123/404 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 571,498 | Nov. 17, 1896 | E. Rappe | Gas Engine | |
| 582,108 | May 04, 1897 | A. Winton | Explosive Engine | ||
| 640,673 | Jan. 02, 1900 | G.W. Lewis | Gas Engine | ||
 | 806,125 | Dec. 05, 1905 | F.O. Farwell | Rotary Explosive Engine | |