| Patents for John Herbert Abramson |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 1,740,055 | Dec. 17, 1929 | J.H. Abramson | Expansive bit | adjustable drill bits |
| 1,753,103 | Apr. 01, 1930 | J.H. Abramson | Recessing tool | chisels |
| 1,758,069 | May 13, 1930 | J.H. Abramson | Bit Extension | drill bit extensions |
| 1,971,289 | Aug. 21, 1934 | E.C. Swanson, J.H. Abramson | Ratcheting Screwdriver | spiral screwdrivers |
| 1,971,290 | Aug. 21, 1934 | E.C. Swanson, J.H. Abramson | Ratchet mechanism | spiral screwdrivers |
| 1,971,291 | Aug. 21, 1934 | E.C. Swanson, J.H. Abramson | Ratchet device | spiral screwdrivers |
