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| All Patents in class 280/137.503 | |||||
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| Number | Date | Patentee | Title | Type | |
| 660,048 | Oct. 16, 1900 | G.F. Conner | Traction Engine | traction engine steering apparatus | |
| 870,241 | Nov. 05, 1907 | W.H. Cahill, W.F. MacGregor | Draft Apparatus for Wagons and the Like | wagons and carts | |