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| Patents Granted on 1831-04-09 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,465X | Apr. 09, 1831 | E. Davis | Tread or tube wheel | ||
| 6,466X | Apr. 09, 1831 | J. Parker, H.M. Smith | Corn shelling machine | corn shellers | |