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| All Patents in class 172/694 | |||||
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| Number | Date | Patentee | Title | Type | |
| 88 | Nov. 26, 1836 | N.J. Shull | Cultivator | cultivators and tillers | |
| 192,029 | Jun. 12, 1877 | G.F. Wilson, P.S. Tartt | Cultivator | cultivators and tillers | |