| Patents Granted on 1812-05-12 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 1,726X | May 12, 1812 | P. Geiger | Breaking plaster of paris | paint grinding mills |
| 1,727X | May 12, 1812 | D. Dod | Steam engine | steam engines |
| 1,728X | May 12, 1812 | J. Grannis | Horse mills using weights | |
| 1,729X | May 12, 1812 | W. Stanton | Washing machine | washing machines |
| 1,730X | May 12, 1812 | D. Sperry | Boring hubs and felloes of wheels | drilling and boring |
| 1,731X | May 12, 1812 | D. Pettibone | Warming Rooms by Rarified Air Applicable to Ovens, Hot or Green Houses, Rooms, Etc. | furnaces |
