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| All Patents in class 123/532 | |||||
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| Number | Date | Patentee | Title | Type | |
| 553,488 | Jan. 21, 1896 | W.W. Grant | Gas Engine | gas and gasoline engines | |
| 582,073 | May 04, 1897 | F.S. Mead | Gas or Oil Engine | oil engines | |
| 583,399 | May 25, 1897 | G.W. Lewis | Gas or Oil Vapor Engine | internal combustion engines | |
| 1,451,407 | Apr. 10, 1923 | C.E. Sargent | Internal Combustion Engine | diesel engines | |