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| All Patents in class 123/198B | |||||
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| Number | Date | Patentee | Title | Type | |
| 511,535 | Dec. 26, 1893 | G.W. Lewis | Gas Engine | gas and gasoline engines | |
| 661,078 | Nov. 06, 1900 | J.B. Roger | Vapor Engine | gas and gasoline engines | |