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| Patents Granted on 1833-04-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,547X | Apr. 20, 1833 | C.W. Bacon | Measuring for garments | garment measuring tools | |
| 7,548X | Apr. 20, 1833 | T.P. Codman | Propelling machinery by combining air, animal, and water power | ||