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| All Patents in class 180/69.6 | |||||
| Number | Date | Patentee | Title | Type | |
| 355,940 | Jan. 11, 1887 | W.L. Leland | Traction Engine | traction engine propulsion components | |
| 644,598 | Mar. 06, 1900 | C.O. Heggem | Motor Vehicle | automobiles | |