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| Patents Granted on 1812-03-16 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,684X | Mar. 16, 1812 | J. Heavin | Machine for dressing shingles | shingle machines | |
| 1,685X | Mar. 16, 1812 | S. Clements | Spinning machine for wool | spinner | |