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| Patents Granted on 1830-12-29 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,311X | Dec. 29, 1830 | S.P. Mason | Speeder for spinning cotton roping | spinner | |
| 6,312X | Dec. 29, 1830 | J.C. Porter | Brick, moulding and tempering clay | brick maker | |