| Patents Granted on 1920-05-?? |
Patents 1 -
15
of 37
      |
| Number | Date | Patentee | Title | Type |
| 1,338,670 | May 04, 1920 | E.T. Bishop, W. Bolton | Means for Measuring the Pitch of Screws and the Like | thread gages |
| 1,338,682 | May 04, 1920 | J.H. Dorman | Jack | lifting jacks |
| 1,338,752 | May 04, 1920 | A.M. Sosa | Drilling Machinery | radial drill presses |
| 1,338,757 | May 04, 1920 | G.D. Sundstrand | Relieving attachment for lathes | metal lathe accessories and attachments |
| 1,338,804 | May 04, 1920 | D.C. Woodworth | Antiskid Chain Tool | pliers |
| 1,338,822 | May 04, 1920 | W.C. Farnum | Cutter | |
| 1,338,846 | May 04, 1920 | M.H. Rix, R.B. Linsley, H.E. Thompson | Standpipe | standpipes |
| 1,338,932 | May 04, 1920 | F.O. Jaques, Sr. | Micrometer Gage | micrometers |
| 1,339,054 | May 04, 1920 | C.A. Brandt, A.J. Langelier | Swaging-machine for making U-shaped pipe-bends | metal swaging machines |
| 1,339,081 | May 04, 1920 | J. Weintz | Annealing and heat-treating furnace | |
| 1,339,213 | May 04, 1920 | M. Manning | Pocket Tool Holder | tool holders |
| 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 |
