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| All Patents in class 200/19.07 | |||||
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| Number | Date | Patentee | Title | Type | |
| 522,811 | Jul. 10, 1894 | J. Walrath | Explosive Gas Engine | gas and gasoline engines | |
| 604,241 | May 17, 1898 | D.M. Tuttle | Gas Engine | gas and gasoline engines | |
| 2,228,068 | Jan. 07, 1941 | E.J. White | Integrating Apparatus | conveyors and hoppers | |