| Patents Granted on 1920-04-20 |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 1,337,313 | Apr. 20, 1920 | W.F. Groene | Device for connecting tools to spindles | milling machines |
| 1,337,350 | Apr. 20, 1920 | F.L. Forward | Portable planing-machine | wood planers |
| 1,337,352 | Apr. 20, 1920 | E.B. Gardner | Work-table for grinding-machines | grinders |
| 1,337,353 | Apr. 20, 1920 | E.B. Gardner | Grinding-machine | grinders |
| 1,337,387 | Apr. 20, 1920 | C. Bouillon | Tool Cabinet | metal lathe accessories and attachments |
| 1,337,520 | Apr. 20, 1920 | P.E. Lane | Drop Hammer | drop hammers |
| 1,337,648 | Apr. 20, 1920 | V.A. Fynn | Synchronous alternating-current motor | AC motors |
| 1,337,678 | Apr. 20, 1920 | J.H. Williams | Wrench | self-adjust wrenches |
| 1,337,770 | Apr. 20, 1920 | F.G. Hobart | Oil Engine Feeding Device | fuel injection apparatus |
| 1,337,771 | Apr. 20, 1920 | C.B. Jahnke, F.G. Hobart | Oil Engine | oil engines |
| 1,337,899 | Apr. 20, 1920 | F.F. Girard | Jar Wrench and Holder | jar wrenches |
