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| Patents Granted on 1821-08-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,376X | Aug. 30, 1821 | J. Altoffer, W. Bushnell | Machine for spinning wool, etc. | spinner | |
| 3,377X | Aug. 30, 1821 | W. Bushnell, J. Altoffer | Machine for raising water by weight | ||