| All Patents in class 409/55 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
| | 70,192 | Oct. 29, 1867 | T.F. Freeman | Cutting Gears |
| | 78,896 | Jun. 16, 1868 | E. Roberts | Cutting Teeth on Metal Wheels |
 | 148,884 | Mar. 24, 1874 | J.L. Hewes | Improvement in machines for making gear-wheel patterns |
| | 400,645 | Apr. 02, 1889 | H.E. Eberhardt, U. Eberhardt | Automatic Machine for Cutting Rack Teeth |
 | 496,676 | May 02, 1893 | J. Walker | Gear-cutting machine |
 | 515,906 | Mar. 06, 1894 | U. Eberhardt, H.E. Eberhardt | Multiplex gear-cutter |
 | 553,037 | Jan. 14, 1896 | A. Mertes | Gear-cutting machine |
 | 607,982 | Jul. 26, 1898 | W.G. Burnham | Gear-cutting machine |
| | 638,562 | Dec. 05, 1899 | J.S. Copeland | Gear Cutting Machine |
| | 1,373,816 | Apr. 05, 1921 | C.J. Howard | Speed-Changing Mechanism for Metal-Working Machines |
