| Patents Granted on 1820-12-?? |
Patents 1 -
15
of 16
      |
| Number | Date | Patentee | Title | Type |
| 3,264X | Dec. 07, 1820 | J. Fisk (Fiske) | Combination of improvements on the double speeder | spinner |
| 3,265X | Dec. 07, 1820 | J. Fisk (Fiske) | Improvement on no. 1 double speeder | spinner |
| 3,266X | Dec. 07, 1820 | J. Fisk (Fiske) | Improvement on no. 2 double speeder | spinner |
| 3,267X | Dec. 08, 1820 | J. Fisk (Fiske) | Improvement on no. 3 double speeder | spinner |
| 3,268X | Dec. 08, 1820 | J. Fisk (Fiske) | Improvement on no. 4 double speeder | spinner |
| 3,269X | Dec. 08, 1820 | J. Fisk (Fiske) | Improvement on no. 5 double speeder | spinner |
| 3,270X | Dec. 11, 1820 | R. Hunt | Machine for doweling heading for cooperage | cooper |
| 3,271X | Dec. 12, 1820 | D.K. VanVechten | Improvement in raised banding and ornamental binding | |
| 3,272X | Dec. 14, 1820 | J. Fay, J. Seaver | Cast iron plough | plows |
| 3,273X | Dec. 16, 1820 | G.P. Digges | Application of the oil of cotton seed for all the purposes of linseed oil | |
| 3,274X | Dec. 21, 1820 | T.J. Bond | Iron boats for navigating rivers | boats and ships |
| 3,275X | Dec. 30, 1820 | P. Moody | Double speeder | spinner |
| 3,276X | Dec. 30, 1820 | J. Fisher | Machinery for sleighs | |
| 3,277X | Dec. 30, 1820 | E. Hardy, S. Hardy | Reel for spinning and making tobacco | tobacco machinery |
| 3,278X | Dec. 30, 1820 | H. Allen | Current and Tide Mill | tide mills |
