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| All Patents in class 138/30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 532,980 | Jan. 22, 1895 | F.P. Mill | Gas Engine | gas and gasoline engines | |
| 609,670 | Aug. 23, 1898 | S.A. Haines | Wrench | axle nut wrenches that lock nut to wheel hub | |