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| All Patents in class 475/203 | |||||
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| Number | Date | Patentee | Title | Type | |
| 379,996 | Mar. 27, 1888 | F.M. Walker, H.D. Smith | Traction Engine | traction engine propulsion components | |
| 588,877 | Aug. 24, 1897 | C. Quast | Traction Engine | steam traction engines | |