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| All Patents in class 123/46R | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,753 | Aug. 18, 1842 | A. Perry, A.M. Bouton | Mode of Changing Reciprocating into Rotary Motion for Steam Engines and Other Purposes | ||
 | 179,782 | Jul. 11, 1876 | F.W. Gilles | Gas Engine | |
 | 418,418 | Dec. 31, 1889 | L.H. Nash | Method of Operating Gas Engines | |
| 424,000 | Mar. 25, 1890 | G.E. Hibbard | Rotary Gas Engine | ||
| 602,707 | Apr. 19, 1898 | G.A. Newman | Explosive Engine | ||
 | 2,433,007 | Dec. 23, 1947 | C.S. Weyandt | Internal-combustion percussion tool | |