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| All Patents in class 48/103 | |||||
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| Number | Date | Patentee | Title | Type | |
| 595,497 | Dec. 14, 1897 | W. Rowbotham | Oil, Gas or Like Engine | oil engines | |
| 597,921 | Jan. 25, 1898 | E.D. Strong | Explosive Engine | oil engines | |