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| Patents Granted on 1811-03-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,482X | Mar. 30, 1811 | J. Boynton | Machine for stringing and grinding cards | spinner | |
| 1,483X | Mar. 30, 1811 | C. Alger | mode of casting large iron rollers for rolling iron | trade specific | |