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| Patents Granted on 1830-06-30 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,055X | Jun. 30, 1830 | J. Pierce | Spinning machine, called farmers' handy maid | spinner | |
| 6,056X | Jun. 30, 1830 | W. VanDuzer | Hemp brake | flax and hemp machines | |