| Patents Granted on 1920-05-11 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 1,339,409 | May 11, 1920 | A.L. Smith, W.S. Myers | Portable Boring and Grinding Device for Automotive Cylinders | portable turning tools |
| 1,339,422 | May 11, 1920 | A.C. Rosenbrook | Valve Tool | valve spring tools |
| 1,339,452 | May 11, 1920 | E.T. Gorham | Dressing-tool for grinding-wheels | grinder dressers |
| 1,339,500 | May 11, 1920 | E.T. Larkin, C.A. Criqui | Pump | diaphragm pumps |
| 1,339,656 | May 11, 1920 | F.J. Lapointe | Cutter-bar and bushing therefor | key seating machines |
| 1,339,657 | May 11, 1920 | F.J. Lapointe | Finishing-broach | broaches |
| 1,339,773 | May 11, 1920 | H.M. Lucas | Power-press | arbor presses |
| 1,339,791 | May 11, 1920 | F.D. Hatfield, A.C. Savidge | Valve Lathe | metal lathes |
| 1,339,839 | May 11, 1920 | A. Winton | Cam Shaft Structure and Oiling Mechanism for Internal Combustion Motors | internal combustion engine lubrication |
| 1,339,958 | May 11, 1920 | K.W. Karlsson | Feeding attachment for bit-stocks | |
| 1,339,983 | May 11, 1920 | W.H. Runge | Relieving attachment for lathes and the like | metal relieving attachments |
| 1,339,984 | May 11, 1920 | W.H. Runge | Micrometer gage or stop device for lathes or the like | metal lathe accessories and attachments |
