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| All Patents in class 180/6.66 | |||||
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| Number | Date | Patentee | Title | Type | |
| 281,813 | Jul. 24, 1883 | A.O. Wilson | Traction Engine | steam traction engines | |
| 1,750,453 | Mar. 11, 1930 | W.I. Thompson | Tractor | tractors | |