| Patents Granted on 1831-04-07 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 6,454X | Apr. 07, 1831 | R.M. Beach | Boiling liquids of all kinds | |
| 6,455X | Apr. 07, 1831 | L. Carman | Inclined friction roller press | |
| 6,456X | Apr. 07, 1831 | E.V. Coe | Churning cream by atmospheric air | churns |
| 6,457X | Apr. 07, 1831 | U. Emmons | Accenting meteronome for teaching music | musical instruments |
| 6,458X | Apr. 07, 1831 | M. Isaacs | Manufacturing coke from anthracite or other coal | |
| 6,459X | Apr. 07, 1831 | J. Knight | Improvement in Sneed's scythe | |
| 6,460X | Apr. 07, 1831 | C. Richmond, S. Caswell, Jr. | Spades and shovels | making hoes |
