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| Patents Granted on 1804-04-14 | |||||
| Number | Date | Patentee | Title | Type | |
| 542X | Apr. 14, 1804 | E. Parsons, C. Whiting | Mode of working sheet tin | tinsmith | |
| 543X | Apr. 14, 1804 | J. Eaton | Improvement in Springs for Window Sashes | door and window hardware | |