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| Patents Granted on 1823-01-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,642X | Jan. 21, 1823 | G. Reynolds | Thrashing machine | miller | |
| 3,643X | Jan. 21, 1823 | A. Arnold | Improvement in the double speeder, cotton roving machine | spinner | |