| Patents Granted on 1800-??-?? |
Patents 1 -
15
of 43
      |
| Number | Date | Patentee | Title | Type |
| 267X | Jan. 16, 1800 | O. Evans | Improvement on stoves and grates | stoves |
| NX-180,002,011 | Feb. 01, 1800 | C. Constant | Composition, Preserving Wood and Brick | preserving wood |
| 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, &c. | preserving wood |
| 270X | Feb. 04, 1800 | J.G. Gebhard | Extracting Oil From Palma Christi | purifying oil |
| 271X | Feb. 07, 1800 | B. Bolitho | Machine for pounding rice, gunpowder, etc. | miller |
| 272X | Feb. 07, 1800 | W. Shotwell | Wheels, Metal Boxes for Wood or Iron to Turn In | wagon and cart wheels, axles and hubs |
| 273X | Feb. 12, 1800 | J.J. Hawkins | Improvement in piano fortes | music instrument maker |
| 274X | Feb. 12, 1800 | H. Killey, II | Method of Covering Salt Vats from the Weather | salt making apparatus |
| 275X | Feb. 12, 1800 | P. Lyon | Engine for throwing water | steam pumps |
| 276X | Feb. 12, 1800 | N. Ladd | Extracting Essence of Sumack, Fera, etc for Tanning | leatherworker |
| 277X | Feb. 20, 1800 | J. Coxe | Raising or Lifting Hides in Tanning | leatherworker |
| 278X | Feb. 20, 1800 | B. Tyler | Grist Mill | grist mills |
| GB-180,002,378 | Feb. 28, 1800 | P. Crowther | Applying steam engine to rotative axis | |
| 279X | Mar. 03, 1800 | J. Percy | Improvement in dying blue | dyeing materials |
