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| Patents Granted on 1831-04-08 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,461X | Apr. 08, 1831 | D. Anthony | Horse shoes | farrier | |
| 6,462X | Apr. 08, 1831 | J. Appleton | Washing machine | washing machines | |
| 6,463X | Apr. 08, 1831 | J. Eastman | Bellows for blowing by steam | ||
| 6,464X | Apr. 08, 1831 | W.B. Marks | Thrashing machine | threshers and thrashers | |