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| Patents Granted on 1831-03-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,434X | Mar. 25, 1831 | T. Blanchard | Steamboat for the passage of rapids | steamboats | |
| 6,435X | Mar. 25, 1831 | A. McClung | Brick press | brick maker | |