| All Patents in class 409/39 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 638,216 | Dec. 05, 1899 | J.S. Copeland | Gear-cutting machine | gear making machines |
| 780,314 | Jan. 17, 1905 | L.T. Weiss | Rack Cutting Apparatus | gear making machines |
| 806,075 | Nov. 28, 1905 | T. Fawcus | Spiral Gear Cutting Machine | gear making machines |
| 1,092,571 | Apr. 07, 1914 | C.J. Halborg | Machine for Backing Off Hobs or Cutters for Cutting Gears | backing off lathes |
| 1,279,278 | Sep. 17, 1918 | M.O. Cross | Gear Toot Rounder | gear making machines |
| 2,348,845 | May 16, 1944 | H. Pelphrey | Machine for Forming Gears | gear making machines |
