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| All Patents in class 475/250 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 271,464 | Jan. 30, 1883 | E. Huber | Traction Engine | ||
| 366,226 | Jul. 12, 1887 | F.F. Landis | Traction Engine | ||
| 1,446,484 | Feb. 27, 1923 | J. Ross | Drive Wheel Locking Device | ||