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| Patents Granted on 1824-05-11 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,868X | May 11, 1824 | E. Kellog | Flax and hemp dressing machine | flax and hemp machines | |
| 3,869X | May 11, 1824 | R. Winans | Cast iron plough | plows | |