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| All Patents in class 172/333 | |||||
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| Number | Date | Patentee | Title | Type | |
| 18,530 | Oct. 27, 1857 | N. Whitehall | Improvement in Cultivators | cultivators and tillers | |
| 79,598 | Jul. 07, 1868 | N.A. Rand | Cultivator | cultivators and tillers | |