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| Patents Granted on 1831-08-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,699X | Aug. 15, 1831 | J. Estes | Propelling mills by rolling and balance wheel power | ||
| 6,700X | Aug. 15, 1831 | D. Fox | Brick moulding | brick maker | |
| 6,701X | Aug. 15, 1831 | W. Phillips | Rake horse | rakes | |
| 6,702X | Aug. 15, 1831 | D.A. Piper | Edging metal plates for roofing houses | ||
| 6,703X | Aug. 15, 1831 | I.S. Richardson | Self-acting fire alarm | ||
| 6,704X | Aug. 15, 1831 | J. Spencer | Gumming and trimming saws | saw teeth | |