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| Patents Granted on 1812-03-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,692X | Mar. 28, 1812 | S. Currie | Tanning | ||
| 1,693X | Mar. 28, 1812 | J. Thorp (Thorpe) | Hand and water loom | looms | |
| 1,694X | Mar. 28, 1812 | J.D. De Lacy | Machine for working mill | miller | |
| 1,695X | Mar. 28, 1812 | A. Campbell | Loom | looms | |