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| Patents Granted on 1831-10-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,816X | Oct. 31, 1831 | D.H. Hooper | Boiler, and regulating the heat of water therein | stationary boilers | |
| 6,817X | Oct. 31, 1831 | S. Richards | Glass knobs | ||
| 6,818X | Oct. 31, 1831 | T. Williams | Scraping flesh and hair from hides in the process of tanning | ||