| All Patents in class 409/47 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 749,683 | Jan. 12, 1904 | H. Bilgram | Process of shaping gear-teeth | gear making machines |
| 1,222,709 | Apr. 17, 1917 | W.F. Zimmermann | Gear-generating machine | gear making machines |
| 1,266,839 | May 21, 1918 | M. Maag | Gear Cutting Machine | gear making machines |
| 1,270,183 | Jun. 18, 1918 | M. Maag | Gear Cutting Machine | gear making machines |
| 1,422,462 | Jul. 11, 1922 | W. Owen, J.H. Melloy | Gear Cutting, Slotting, and Like Machine | gear making machines |
| 1,477,562 | Dec. 18, 1923 | R.L. Hibbard, F.W. Wappat | Gear cutting | gear making machines |
