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| Patents Granted on 1821-08-06 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,353X | Aug. 06, 1821 | R. Rose | Mode of cutting gun trucks | gunsmith | |
| 3,354X | Aug. 06, 1821 | B.I. Kallenbach | Perpetual proof still | ||