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| All Patents in class 123/318 | |||||
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| Number | Date | Patentee | Title | Type | |
| 575,326 | Jan. 19, 1897 | H.S. Bristol | Gas Engine | gas and gasoline engines | |
| 816,215 | Mar. 27, 1906 | L.F. Burger | Tandem Gas Engine | gas and gasoline engines | |