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| Patents Granted on 1825-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,047X | Mar. 12, 1825 | L.W. Wright | Machine for making pins | ||
| 4,048X | Mar. 12, 1825 | J. Turner | Circular propelling levers for machinery | ||
| 4,049X | Mar. 12, 1825 | N. Rider | Wool carding machine | cloth carding machines | |
| 4,050X | Mar. 12, 1825 | B. Browning, E. Hord | Preserving flour for exportation | ||