| Patents Granted on 1821-??-?? |
Patents 1 -
15
of 158
      |
| 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 |
| 3,287X | Feb. 01, 1821 | J. Wood | Shifting share for ploughing | plows |
| 3,288X | Feb. 01, 1821 | R. Graves (Greaves) | Machine for laying cordage | rope maker |
| 3,289X | Feb. 01, 1821 | G.J. Newberry | Mode of applying dry metallic and colored powders to type printing | |
| 3,290X | Feb. 02, 1821 | D. Jarvis (Jarves) | Opening the mould of glass blowers | glassmaker |
| 3,291X | Feb. 05, 1821 | J.J. Giraud | Horizontal pedal water wheel and perpendicular pivot | water wheels |
| 3,292X | Feb. 09, 1821 | B.S. Doxey | Machinery for gearing and ungearing the paddle wheels for propelling all kinds of vessels | nautical propulsion apparatus |
| 3,293X | Feb. 17, 1821 | C. White | Water proof cement | |
| 3,294X | Feb. 17, 1821 | P. Davis | Vibrating steam engine | steam engines |
