| Patents Granted on 1822-04-__ |
Patents 1 -
15
of 25
      |
| Number | Date | Patentee | Title | Type |
| 3,489X | Apr. 02, 1822 | J. Sarchet | Machine for punching holes in metals | metal punching machines |
| 3,490X | Apr. 04, 1822 | S. Brooks | Method of separating hair from skins | |
| 3,491X | Apr. 06, 1822 | P. Smith | Printing press | printing presses |
| 3,492X | Apr. 11, 1822 | S. Spalding | Fire places | |
| 3,493X | Apr. 13, 1822 | B. Maltby | Domestic looms | looms |
| 3,494X | Apr. 13, 1822 | E. Williams | Covering of rollers for sizing | |
| 3,495X | Apr. 13, 1822 | S. Dew | Mapping instrument, or universal compass | surveyor |
| 3,496X | Apr. 16, 1822 | W. Loveland, S. Lockwood | Fire engine | fire engines |
| 3,497X | Apr. 16, 1822 | W.W. Weaver | Making stove pipe | stove pipes |
| 3,498X | Apr. 17, 1822 | P. Griener | Distilling | |
| 3,499X | Apr. 19, 1822 | J. Justin | Machine for washing and for grinding | washing machines |
| 3,500X | Apr. 19, 1822 | R. Hyde | Machine for making pails | |
| 3,501X | Apr. 19, 1822 | E. Skinner | Fender for fire places | |
| 3,502X | Apr. 19, 1822 | J.M. Merrow, R. McKee, Jr. | Making gunpowder | |
| 3,503X | Apr. 23, 1822 | E. Case | Scraper, or team shovel | scrapers |
