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| Patents Granted on 1820-01-10 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,161X | Jan. 10, 1820 | E. Treadwell | Bread finisher | baker | |
| 3,162X | Jan. 10, 1820 | E. Crain | Making ropes and cordage | rope maker | |