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| All Patents in class 123/59.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 546,110 | Sep. 10, 1895 | E.E. Butler | Gas Engine | gas and gasoline engines | |
| 604,241 | May 17, 1898 | D.M. Tuttle | Gas Engine | gas and gasoline engines | |