| Patents Granted on 1819-04-?? |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 3,090X | Apr. 02, 1819 | W. Harper | Elastic seat saddles | |
| 3,091X | Apr. 03, 1819 | P. Moody | Double speeder for roping cotton | rope maker |
| 3,092X | Apr. 03, 1819 | J. Lyon | Propelling boats | nautical propulsion apparatus |
| 3,093X | Apr. 08, 1819 | A. Stewart | Brick making machine | brick maker |
| 3,094X | Apr. 12, 1819 | C.T. Baker | Machine for clearing obstructed channels or docks | |
| 3,095X | Apr. 23, 1819 | S.(. Peck | Machine for making tin ware | tinsmith |
| 3,096X | Apr. 23, 1819 | S. Fahnestock | Apparatus for making mineral waters | |
| 3,097X | Apr. 25, 1819 | J. Ordronau (Ordronan) | Balance or fly wheels applied to power machinery | |
| 3,098X | Apr. 26, 1819 | J.L. Munson | Pump | pumps |
| 3,099X | Apr. 29, 1819 | G.N. Reynolds | Spring for carriages | |
| 3,100X | Apr. 30, 1819 | G.N. Reynolds | Improvement on the moveable axle | |
| 3,101X | Apr. 30, 1819 | E. Brown | Tobacco press | tobacco machinery |
| 3,102X | Apr. 30, 1819 | J. Lansing, Jr. | Use of hemlock in tanning | |
