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| Patents Granted on 1831-05-05 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,541X | May 05, 1831 | S. Andrews | Generating gas by means of a spirit lamp | household tools | |
| 6,542X | May 05, 1831 | J. Baker | Medicine | ||
| 6,543X | May 05, 1831 | J. Crail | Churn | churns | |
| 6,544X | May 05, 1831 | J.F. Nunns | Piano forte action | music instrument maker | |
| 6,545X | May 05, 1831 | C.A. Ore | Manufacturing boots and shoes | ||