| X Patents |
Patents 256 -
270
of 9755
      |
| Number | Date | Patentee | Title | Type |
| 256X | Aug. 30, 1799 | S.E. Hamlin | Capstan fire engine | fire engines |
| 257X | Oct. 28, 1799 | M. McFarland | Federal balloon | hot air balloons |
| 258X | Oct. 28, 1799 | A. Kinsley | Universal pump | plumber |
| 259X | Oct. 28, 1799 | R.R. Livingston | Manufacturing of paper | manufacturing processes |
| 260X | Nov. 05, 1799 | D. Keller | Boat for descending rapid streams | boats and ships |
| 261X | Nov. 29, 1799 | J. Stickney | Pumps for ships, mines, etc. | pumps |
| 262X | Dec. 02, 1799 | T. Payne | Saw mill | sawmills |
| 263X | Dec. 14, 1799 | J. Hawks | Hawks' pills | medical pills and syrups |
| 264X | Dec. 14, 1799 | A. Wilder | Runners and Bows for Sleighs and Sledges | wagon maker |
| 265X | Dec. 16, 1799 | H. Chase | Mills | miller |
| 266X | Dec. 24, 1799 | J. Pittman | Effeminate Ropery for Spinning Rope Yarn | rope maker |
| 267X | Jan. 16, 1800 | O. Evans | Improvement on stoves and grates | stoves |
| 268X | Feb. 04, 1800 | S. Gorham | Machine for spinning rope, yarn and twine | rope maker |
| 269X | Feb. 04, 1800 | S. Constant | Composition to preserve wood, brick, etc. | carpenter |
| 270X | Feb. 04, 1800 | J.G. Gebhard | Extracting oil from palma christi | purifying oil |
