| Patents Granted on 1804-04-?? |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 541X | Apr. 12, 1804 | O. Robert | Machine for Breaking and Cleaning Flax and Hemp | flax and hemp machines |
| 542X | Apr. 14, 1804 | E. Parsons, C. Whiting | Mode of working sheet tin | tinsmith |
| 543X | Apr. 14, 1804 | J. Eaton | Improvement in Springs for Window Sashes | door and window hardware |
| 544X | Apr. 17, 1804 | M. Garber | Nail Machine | nail making machines |
| 545X | Apr. 17, 1804 | J.J. Girand | Double steam bath still | steam stills |
| 546X | Apr. 24, 1804 | P. Gottry | Machine for Cleaning Flax Seed | flax and hemp machines |
| 547X | Apr. 30, 1804 | M. Withers | Clover Huller | clover hullers |
| 548X | Apr. 30, 1804 | M. Coates, E. Evans | Machine for cutting straw and hay | hay or straw cutters |
