| Patents Granted on 1821-02-?? |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 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 |
| 3,295X | Feb. 19, 1821 | P. Moody | Cotton roping (double speeder) | spinner |
| 3,296X | Feb. 19, 1821 | P. Moody | Cotton spinning frames | spinner |
| 3,297X | Feb. 19, 1821 | P. Moody | Machine for roping or spinning cotton | spinner |
| 3,298X | Feb. 20, 1821 | W. Gould | Foot gin for cleaning cotton | cotton gins |
| 3,299X | Feb. 20, 1821 | T. Blake | Lever press | lever presses |
| 3,300X | Feb. 20, 1821 | Z. Carey (Cary) | Machine for shearing cloth | splitting and shearing machinery |
| 3,301X | Feb. 21, 1821 | I. Deaves | Making mantel pieces of cast iron or other soft metal | |
