| All Patents in class 451/900 |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| 371,847 | Oct. 18, 1887 | J.N. Lapointe | Machine for polishing pinion-leaves | gear making machines |
| 749,683 | Jan. 12, 1904 | H. Bilgram | Process of shaping gear-teeth | gear making machines |
| 953,752 | Apr. 05, 1910 | A.H. Neureuther | Automatic Pinion Cutting Machine | gear making machines |
| 1,190,391 | Jul. 11, 1916 | E.R. Fellows | Means for Generating and Cutting Irregular Gears | gear making machines |
| 1,216,454 | Feb. 20, 1917 | A.J. Gosselin, A.H. Ingle | Gear Tooth Rounding Machine | gear making machines |
| 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 | gear making machines |
| 1,689,274 | Oct. 30, 1928 | H.H. Asbridge | Grinding of Gear-Wheel Teeth | gear grinding machines |
| 1,798,059 | Mar. 24, 1931 | M.F. Hill, H. Bilgram | Machine for making rotors | gear making machines |
| 2,113,287 | Apr. 05, 1938 | W.G. Baldenhofer | Machine for Grinding and Sharpening Broaches | broach sharpening machines |
| 2,294,733 | Sep. 01, 1942 | S.G. Brady | Grinding Machine | gear grinding machines |
| 2,296,731 | Sep. 22, 1942 | R.H. Mustonen | Stop mechanism for grinding machines | grinders |
| 2,326,368 | Aug. 10, 1943 | C. Black, A. Kullman | Gear Forming Machine | gear measuring machines |
| 2,348,281 | May 09, 1944 | S.G. Brady | Machine for Grinding Racks | gear grinding machines |
| 2,351,842 | Jun. 20, 1944 | P.F. Seibold | Gear Grinding Machine | gear grinding machines |
