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| Patents Granted on 1830-03-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,877X | Mar. 15, 1830 | R. Miller | Thrashing machine (Thresher) | threshers and thrashers | |
| 5,878X | Mar. 15, 1830 | J.R. Wheeler | Water wheel | water wheels | |