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| Patents Granted on 1831-07-25 | |||||
| Number | Date | Patentee | Title | Type | |
| 6,666X | Jul. 25, 1831 | J. Redifer | Thrashing machine | threshers and thrashers | |
| 6,667X | Jul. 25, 1831 | S. Rogers | Thrashing machine | threshers and thrashers | |