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| All Patents in class 123/78B | |||||
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| Number | Date | Patentee | Title | Type | |
| 617,388 | Jan. 10, 1899 | W.F. Bauroth, E. Bauroth | Gas Engine | gas and gasoline engines | |
| 669,416 | Mar. 05, 1901 | O.B. Johnson | Explosive Engine | internal combustion engines | |