| X Patents |
Patents 241 -
255
of 9755
      |
| Number | Date | Patentee | Title | Type |
| 241X | Mar. 19, 1799 | J. Perkins | Check to detect counterfeits | office worker |
| 242X | Mar. 21, 1799 | J. Shackford | Improvement in propelling boats | nautical propulsion apparatus |
| 243X | Mar. 27, 1799 | I. Sanford | Machine for dressing cloth | textile machines |
| 244X | Mar. 27, 1799 | S. Morey | Obtaining force from water by steam | steam engines |
| 245X | Apr. 12, 1799 | P. Pratt | Machine for making ivory combs | comb making machines |
| 246X | Apr. 24, 1799 | S. Morey | Improvement on his water engine | steam engines |
| 247X | Apr. 30, 1799 | B. Dearborn | Double centered mill for wind or water | wind power apparatus |
| 248X | May 08, 1799 | A.W. Duty | New Method to Cut Clay for Tile | tile cutting machines |
| 249X | May 17, 1799 | W. Faris | Machine for raising water | water pumps |
| 250X | May 27, 1799 | C. Gould | Machine to keep ship's distance at sea (reckoning) | mariner |
| 251X | Jun. 26, 1799 | M. Wigglesworth | Making Ropes | rope maker |
| 252X | Jun. 26, 1799 | S.H. Lee | Bilious pills | medical pills and syrups |
| 253X | Jun. 26, 1799 | E. Weld | Improvement in washing clothes | |
| 254X | Aug. 05, 1799 | J. Long | Napping Hats | milliner |
| 255X | Aug. 14, 1799 | R. Robotham | Purifying spermaceti oil | purifying oil |
