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| Patents Granted on 1830-12-06 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,267X | Dec. 06, 1830 | D.C. Ambler, J. Ambler, Jr. | Pressure or weighted grist mill | grist mills | |
| 6,268X | Dec. 06, 1830 | T.D. Burrall | Thrashing and winnowing wheat and small grain | threshers and thrashers | |
| 6,269X | Dec. 06, 1830 | C. Thompson | Machine for making window sashes | window making machines | |