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| All Patents in class 172/314 | |||||
| Number | Date | Patentee | Title | Type | |
| 309,434 | Dec. 16, 1884 | B.S. Benson | Steam Plow | steam plows | |
| 911,703 | Feb. 09, 1909 | H.C. Clay | Gang Plow | traction engine accessories | |