| Patents Granted on 1807-04-__ |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 739X | Apr. 01, 1807 | T. Green | Mode of making salt | |
| 740X | Apr. 01, 1807 | L. Dupre | Pendulum screw | |
| 741X | Apr. 01, 1807 | C. Colver | Double forcing pumps | pumps |
| 742X | Apr. 01, 1807 | G. Youle | Cabouse stove for cooking | stoves |
| 743X | Apr. 01, 1807 | D. Peacock | Plough | plows |
| 744X | Apr. 01, 1807 | J. McIlvain | Machine for dressing shingles and staves | shingle machines |
| 745X | Apr. 01, 1807 | E. Bigelow | Machine for Cutting Nails | nail making machines |
| 746X | Apr. 01, 1807 | J.A. Pearce | Machine for propelling boats, & etc. by oars, & etc. | nautical propulsion apparatus |
| 747X | Apr. 15, 1807 | A. Craig | Method of raising stumps from the ground | stump elevators |
| 748X | Apr. 17, 1807 | S.G. Whipple | Mode of applying bark for hats etc. | milliner |
| 749X | Apr. 17, 1807 | E. Jencks | Mode of making fire brick | brick maker |
| 750X | Apr. 18, 1807 | J. Mix | Main springs for carriages | carriage maker |
| 751X | Apr. 18, 1807 | T. Pope | Construction of bridges | |
| 752X | Apr. 23, 1807 | B. Langdon | Steelyard | steel maker |
| 753X | Apr. 23, 1807 | A. Weaver | Apparatus for distilling | distilling apparatus |
