| All Patents in class 451/900 |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | 371,847 | Oct. 18, 1887 | J.N. Lapointe | Machine for polishing pinion-leaves |
 | 749,683 | Jan. 12, 1904 | H. Bilgram | Process of shaping gear-teeth |
| | 953,752 | Apr. 05, 1910 | A.H. Neureuther | Automatic Pinion Cutting Machine |
| | 1,190,391 | Jul. 11, 1916 | E.R. Fellows | Means for Generating and Cutting Irregular Gears |
| | 1,216,454 | Feb. 20, 1917 | A.J. Gosselin, A.H. Ingle | Gear Tooth Rounding Machine |
| | 1,259,770 | Mar. 19, 1918 | C.G. Olson | Grinding Machine |
 | 1,656,633 | Jan. 17, 1928 | L.O. Carlsen, E. Finsen, E.C. Head | Gear-cutting machine |
| | 1,689,274 | Oct. 30, 1928 | H.H. Asbridge | Grinding of Gear-Wheel Teeth |
 | 1,798,059 | Mar. 24, 1931 | M.F. Hill, H. Bilgram | Machine for making rotors |
| | 2,113,287 | Apr. 05, 1938 | W.G. Baldenhofer | Machine for Grinding and Sharpening Broaches |
