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| All Patents in class 172/100 | |||||
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| Number | Date | Patentee | Title | Type | |
| 47,996 | May 30, 1865 | H. Stanley | Rotary Digger | harrows | |
| 236,771 | Jan. 18, 1881 | E. Brown | Steam Plow | steam plows | |
| 517,047 | Mar. 27, 1894 | C.F. Johnson | Steam Plow | plows | |