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| Patents Granted on 1825-04-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,088X | Apr. 15, 1825 | A. Tanner | Double inclined plane for canals | ||
| 4,089X | Apr. 15, 1825 | D. Stansbury | Construction of furnaces for burning fossil coal | household tools | |