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| Patents Granted on 1820-10-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,244X | Oct. 31, 1820 | N. Sears | Machine for breaking bark etc. | bark processing machines | |
| 3,245X | Oct. 31, 1820 | D. Pease, Jr. | Smut machine | miller | |