| Patents Granted on 1821-01-?? |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 3,280X | Jan. 03, 1821 | J.J. Giraud | Machine for propelling vessels | |
| 3,281X | Jan. 10, 1821 | E. Converse | Machine for cutting dyewoods | excelsior machines |
| 3,282X | Jan. 19, 1821 | P. Moody | Double speeder for roping cotton | spinner |
| 3,283X | Jan. 23, 1821 | J. Brown | Machine for spinning cotton and wool by hand | spinner |
| 3,284X | Jan. 24, 1821 | E.M. Pomeroy | Paste for razor straps | |
| 3,285X | Jan. 26, 1821 | E.J. Rosevelt, H. Rosevelt | Corn shelling machine | miller |
| 3,286X | Jan. 26, 1821 | E. Brown, M. Chandler | Harness for weaving | weaver |
