| Patents Granted on 1800-05-?? |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 285X | May 06, 1800 | S. Stone | Elastic truss for ruptures | medical devices |
| 286X | May 06, 1800 | J. Biddis | Engine for reducing silk, cotton, worsted, cloth, and to their original state to be manufactured | cotton gins |
| 287X | May 08, 1800 | S. Jocelin | Time Keeper | clockmaker |
| 288X | May 14, 1800 | J. Brown | Construction of Ships and Vessels | shipwright |
| 289X | May 15, 1800 | G. Hadfield | Machine for making bricks and tiles | brick maker |
| 290X | May 19, 1800 | E. West | Metal amulets | medical devices |
| 291X | May 19, 1800 | T.O. Harrison | Machine for Splitting Hides and Skins | splitting and shearing machinery |
| 292X | May 19, 1800 | R. Smith | Mould board plow | plows |
| 293X | May 24, 1800 | W. Shotwell | Cogs for pullies | industrial machine pulleys and belt drive mechanisms |
