| Patents Granted on 1804-03-?? |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 528X | Mar. 05, 1804 | D.M. Miller | Pump | plumber |
| 529X | Mar. 05, 1804 | A. Robertson | Mode of Preparing Marble for Painting On | painter |
| 530X | Mar. 08, 1804 | D.M. Miller | Improvement in Window Fastenings or Springs for Fastening and Supporting Sash-Weights | door and window hardware |
| 531X | Mar. 10, 1804 | S.P. Lord, Jr. | Improvement in Extinguishing Fires in Houses | fire extinguishers |
| 532X | Mar. 16, 1804 | M. Smith | Machine for watering cattle | |
| 533X | Mar. 19, 1804 | W. Jackson, W. Gilman | Improvement in the bedstead, so constructed that it may be taken down and removed by one person in case of fire or on other occasions with much ease and expedition | |
| 534X | Mar. 19, 1804 | A. Frost | Machine for preparing tow for paper | printer |
| 535X | Mar. 19, 1804 | B. Tyler | Wry Fly Applied to Mills | water wheels |
| 536X | Mar. 23, 1804 | J. Williams | Inclined Plane, Statical Wheel | inclined planes |
| GB-180,402,754 | Mar. 23, 1804 | T. Rowntree | Machine for agitating and separating certain mixtures | churns |
| 537X | Mar. 24, 1804 | G.W. Robinson | Button Machine | button making machinery |
| 538X | Mar. 24, 1804 | A. Hunn | Machine for the improvement of navigation | shipwright |
| 539X | Mar. 31, 1804 | J. Naylor | Improved still and boiler | steam stills |
| 540X | Mar. 31, 1804 | P. Daniel | Mode of making shot | gunsmith |
