| Patents Granted on 1864-05-17 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 42,738 | May 17, 1864 | R. Barkley, L. Semple | Grindstone-dresser | grinder dressers |
| 42,766 | May 17, 1864 | H.A. Harvey | Improvement in Machines for Threading Wood-Screws | metal threading machines |
| 42,776 | May 17, 1864 | A. Jillson | Improvement in Sliding Scales for Steam Engines | rules |
| 42,780 | May 17, 1864 | J.A. Knight | Improvement in wood-splitting machines | firewood machines |
| 42,784 | May 17, 1864 | J.L. Morrill | Cork Drawer | non worm cork extractors |
| 42,790 | May 17, 1864 | H. Pelsue | Improved device for chamfering barrel-hoops | hoop making machines |
| 42,797 | May 17, 1864 | W. Sellers | Improvement in Machines for Planing Iron | metal planers |
