| Patents Granted on 1831-03-__ |
Patents 1 -
15
of 38
      |
| Number | Date | Patentee | Title | Type |
| 6,402X | Mar. 01, 1831 | P. Barlow | Rifle for sharpening tools | |
| 6,403X | Mar. 02, 1831 | S. Hyde | Oval axes | axes |
| 6,404X | Mar. 03, 1831 | S.C. Roe | Conical stove | stoves |
| 6,405X | Mar. 05, 1831 | J. Cleeves | Raising vessels out of the water | |
| 6,406X | Mar. 05, 1831 | E. Kimber | Rails adapted to locomotive carriage | |
| 6,407X | Mar. 05, 1831 | J. McMullen, J. Hollen, Jr. | Knitting stockings | |
| 6,408X | Mar. 07, 1831 | J.C. Gentry | Thrashing machine | threshers and thrashers |
| 6,409X | Mar. 08, 1831 | F. Cross | Improvement on Douglass' thrashing machine | threshers and thrashers |
| 6,410X | Mar. 08, 1831 | B. Hackett | Block for stereotype plates | printer |
| 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 | |
| 6,415X | Mar. 10, 1831 | H. Robinson | Gas meters | gas meters |
| 6,416X | Mar. 11, 1831 | I. Wilson | Cast iron door knockers with brass plates | household tools |
