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| All Patents in class 56/15.8 | |||||
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| Number | Date | Patentee | Title | Type | |
| 309,434 | Dec. 16, 1884 | B.S. Benson | Steam Plow | steam plows | |
| 1,599,196 | Sep. 07, 1926 | C.C. Baldwin | Power Propelled Device | harvesters | |