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| All Patents in class 123/593 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 439,200 | Oct. 28, 1890 | H.K. Shanck | Gas Engine | ||
 | 583,508 | Jun. 01, 1897 | J.W. Raymond | Gas Engine | |
| 636,048 | Oct. 31, 1899 | E.H. Korsmeyer | Gasolene or Gas Engine | ||
| 650,736 | May 29, 1900 | H. Sutton | Explosive Engine | ||