| Patents Granted on 1821-08-?? |
Patents 1 -
15
of 25
      |
| Number | Date | Patentee | Title | Type |
| 3,353X | Aug. 06, 1821 | R. Rose | Mode of cutting gun trucks | gunsmith |
| 3,354X | Aug. 06, 1821 | B.I. Kallenbach | Perpetual proof still | |
| 3,355X | Aug. 07, 1821 | R. Bulkley | Oblique water wheel | water wheels |
| 3,363X | Aug. 07, 1821 | G. Smith | Anti-Dyspeptic Pills | medical pills and syrups |
| 3,356X | Aug. 08, 1821 | A. Thayer, Jr. | Steam wheel | rotary steam engines |
| 3,357X | Aug. 08, 1821 | J.W. Moore | Machine for Sweeping Chimneys | chimney sweepers |
| 3,358X | Aug. 09, 1821 | J. Eveleth | Mud machine | |
| 3,359X | Aug. 10, 1821 | J. Ketcham, G.F. Reeve | Inclined wheel for churning by dog power | churns |
| 3,360X | Aug. 10, 1821 | F. Woodward | Smut and scouring machine | miller |
| 3,361X | Aug. 10, 1821 | J. Thorp (Thorpe) | Braiding Machine | textile machines |
| 3,362X | Aug. 10, 1821 | J. Richards | Manufacturing sail cloth | looms |
| 3,364X | Aug. 11, 1821 | J. Grant | Machine for setting up hats | milliner |
| 3,365X | Aug. 11, 1821 | B. Taber | Machine for mincing whale's blubber | |
| 3,366X | Aug. 11, 1821 | J. Brown | Vertical spinner | spinner |
| 3,367X | Aug. 14, 1821 | D. Peck | Manufacture of boots and shoes | |
