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| Patents Granted on 1821-03-03 | |||||
| Number | Date | Patentee | Title | Type | |
| 3,306X | Mar. 03, 1821 | T.L. Jennings | Dry Scouring Clothes | clothes drying machine | |
| 3,307X | Mar. 03, 1821 | S. Hart | Cutting boots and shoes by rule | ||