| Patents Granted on 1803-03-?? |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 428X | Mar. 07, 1803 | J. DeMontmollin, W. Bell | Roller cotton gin | cotton gins |
| 429X | Mar. 07, 1803 | J. Naylor | Improvement in Extracting a Spirit From Starch Water | distilling |
| 430X | Mar. 07, 1803 | S. Bent | Wheel to turn under water | water wheels |
| 431X | Mar. 16, 1803 | J.B. Aveilhe | Horizontal wind mill | wind power apparatus |
| GB-180,302,689 | Mar. 16, 1803 | S. Miller | Applying repelling force of nature to give impulse to any body of motion | woodworking power transmission |
| 432X | Mar. 18, 1803 | A.D. Marentille | Wreck Raft | boats and ships |
| 433X | Mar. 18, 1803 | A.D. Marentille | Sea sitting chair | chairs |
| 434X | Mar. 18, 1803 | J. Staples, Jr. | Power Obtained by the Rising and Falling of the Tide to Give Motion to all Kinds of Machinery | tide mills |
| 435X | Mar. 18, 1803 | J. Staples, Jr. | Submarine passage or hollow inverted arch | |
| 436X | Mar. 21, 1803 | J. Cottle | Machine for Cleaning Clover Seed | miller |
| 437X | Mar. 21, 1803 | D.F. Launy | Improvement in time pieces | clockmaker |
| 438X | Mar. 24, 1803 | G. Hunter | Improvement in the Process of Manufacturing Sea Salt | manufacturing salt |
| 439X | Mar. 24, 1803 | J. Picornell, M.D. Peter | Improvement in the mode of obtaining antiseptic gas | |
| 440X | Mar. 28, 1803 | E. Marquam | Improved House Fan | fans |
