| Patents Granted on 1820-11-?? |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 3,246X | Nov. 07, 1820 | W. Burtus | Improvement in baking or burning pans | household tools |
| 3,247X | Nov. 08, 1820 | B. Stancliff (Slaucliff), J. Cluley (Cluhy) | Improvement on the valve cock | |
| 3,248X | Nov. 08, 1820 | S.S. Edmonston | Machine for Sweeping Chimneys | chimney sweepers |
| 3,249X | Nov. 08, 1820 | J. Kirk | Swinging frame for for facilitating shoeing of horses | blacksmith |
| 3,250X | Nov. 09, 1820 | G. Brundage, C. Wood | Plough | plows |
| 3,251X | Nov. 14, 1820 | P. Ettienne | Wind mills | wind power apparatus |
| 3,252X | Nov. 16, 1820 | E. Blake | Bee-Hive | apiary apparatus |
| 3,253X | Nov. 16, 1820 | E. Walker | Saddles | saddles |
| 3,254X | Nov. 21, 1820 | J. Brown | Winnowing machine | winnowing machines |
| 3,255X | Nov. 21, 1820 | C.G. Barstow | Machine for making ramrods | gunsmith |
| 3,256X | Nov. 22, 1820 | R. Graves | Improved mode of drawing yarns and forming them into readies | |
| 3,257X | Nov. 22, 1820 | R. Graves | Machine for equalizing the strain on yarns | spinner |
| 3,258X | Nov. 22, 1820 | R. Graves | Machine for making and laying ropes | rope maker |
| 3,259X | Nov. 22, 1820 | J.J. Giraud | Machine for propelling vessels | |
| 3,260X | Nov. 24, 1820 | J. Brown | Fan Mill | miller |
