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| Patents Granted on 1821-09-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,382X | Sep. 15, 1821 | M. Morrison | Threshing and rice cleaning machine | miller | |
| 3,383X | Sep. 15, 1821 | G. Thompson | Improvement on Perkins' and Reed's nail machine | nail making machines | |