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| Patents Granted on 1831-03-09 | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,411X | Mar. 09, 1831 | S. Boyden | Manufacturing malleable cast iron | trade specific | |
| 6,412X | Mar. 09, 1831 | L.F. Gallup | Applying the principle of Argand to common lamps | household tools | |
| 6,413X | Mar. 09, 1831 | J. Michenor | Water applied to mill wheels | water wheels | |
| 6,414X | Mar. 09, 1831 | A. Pawling | Propelling railroad carriages | ||