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| Patents Granted on 1830-10-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,203X | Oct. 21, 1830 | H. Averill | Water wheel for propelling grist mills | water wheels | |
| 6,204X | Oct. 21, 1830 | C. Wing | Carding wool and other fibrous material | cloth carding machines | |