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| All Patents in class 172/752 | |||||
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| Number | Date | Patentee | Title | Type | |
| FX-3,766 | Oct. 14, 1823 | J. Nash | Plough | plows | |
| 6,784X | Oct. 04, 1831 | W. Black | Plough | plows | |
| 5,526 | Apr. 25, 1848 | F.C. Smith | Plow-Colter | plows | |
| 5,529 | Apr. 25, 1848 | S. Hall | Plow | plows | |