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| Patents Granted on 1828-05-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,108X | May 12, 1828 | J.S. Van De Graff (Graaf) | Machine for breaking hemp | flax and hemp machines | |
| 5,109X | May 12, 1828 | W.R. McCall (McCau) | Machine for spinning wool and cotton from the roll | spinner | |