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| All Patents in class 180/351 | |||||
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| Number | Date | Patentee | Title | Type | |
| 447,978 | Mar. 10, 1891 | G.G. Schroeder | Traction Engine | steam traction engines | |
| 2,099,817 | Nov. 23, 1937 | C.G. Mahana | Vehicle Bearing | railroad motor cars | |