| All Patents in class 409/55 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 70,192 | Oct. 29, 1867 | T.F. Freeman | Cutting Gears | wood gear cutters |
| 78,896 | Jun. 16, 1868 | E. Roberts | Cutting Teeth on Metal Wheels | gear making machines |
| 148,884 | Mar. 24, 1874 | J.L. Hewes | Improvement in machines for making gear-wheel patterns | dovetailing machines |
| 400,645 | Apr. 02, 1889 | H.E. Eberhardt, U. Eberhardt | Automatic Machine for Cutting Rack Teeth | gear making machines |
| 496,676 | May 02, 1893 | J. Walker | Gear-cutting machine | gear making machines |
| 515,906 | Mar. 06, 1894 | U. Eberhardt, H.E. Eberhardt | Multiplex gear-cutter | gear making machines |
| 553,037 | Jan. 14, 1896 | A. Mertes | Gear-cutting machine | gear making machines |
| 607,982 | Jul. 26, 1898 | W.G. Burnham | Gear-cutting machine | gear making machines |
| 638,562 | Dec. 05, 1899 | J.S. Copeland | Gear Cutting Machine | gear making machines |
| 1,972,823 | Sep. 04, 1934 | W.D. Archea | Gear Cutting Machine | gear making machines |
| 1,978,359 | Oct. 23, 1934 | W.D. Archea | Milling Machine | milling machines |
| 4,534,684 | Aug. 13, 1985 | B.H. Johnson | Apparatus For Milling A Gear For A Double Enveloping Worm Gear Drive | |
