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| All Patents in class 172/765 | |||||
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| Number | Date | Patentee | Title | Type | |
| FX-3,063 | Feb. 03, 1819 | S. McCormick | Plough | plows | |
| 8,133X | Apr. 03, 1834 | P. Prettyman | Improvement in harrow-teeth | harrows | |