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| Patents Granted on 1840-12-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE29 | Dec. 28, 1840 | C. Manning | Improvement in machines for cutting staves, &c. | cooper | |
| 1,919 | Dec. 28, 1840 | A. Stillman | Coffee | coffee roasters | |