| Patents Granted on 1791-03-__ |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 6X | Mar. 10, 1791 | J. Stone | Driving piles for bridges, etc. | pile drivers |
| 7X | Mar. 11, 1791 | S. Mullikin | Machine for thrashing grain and corn | miller |
| 8X | Mar. 11, 1791 | S. Mullikin | Breaking and Swingling of Hemp, etc. | spinner |
| 9X | Mar. 11, 1791 | S. Mullikin | Machine for cutting and polishing stone and marble | stone boring and drilling machines |
| 10X | Mar. 11, 1791 | S. Mulliken | Machine for raising a nap on cloths | cloth napping machines |
| 11X | Mar. 17, 1791 | G. Parkinson | Machine for Spinning Hemp and Flax etc. | flax and hemp machines |
