| Patents Granted on 1803-05-?? |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 448X | May 04, 1803 | M. Barney | Machine for Deepening Channels | dredges |
| 449X | May 13, 1803 | W. Hopkins | Ship building | shipwright |
| 450X | May 14, 1803 | G.F. Saltonstall | Rolling machine for cleaning cotton | cotton gins |
| 451X | May 14, 1803 | D. Ilsley | Improvement in Distilling Spirits | distilling |
| 452X | May 17, 1803 | J.T. Hawkins, R. French | Cutting Grain and Grass | lawn mowers |
| 453X | May 17, 1803 | J.J. Hawkins | Pentegraph and parallel ruler | parallel rules |
| 454X | May 17, 1803 | B. Allison | Improvement in the Application of the Principle of Rectifying or Improving Spirits | distilling |
| 455X | May 19, 1803 | J. Clark | Machine for pumping | plumber |
| 456X | May 25, 1803 | J.W. Godfrey | Working bellows for a furnace or forge | blacksmith |
| 457X | May 25, 1803 | T. Alden, Jr. | Expediting the manufacture of common salt | manufacturing salt |
