| All Patents in class 451/47 |
Patents 1 -
10
of 22
      |
| Picture | Number | Date | Patentee | Title |
 | 749,683 | Jan. 12, 1904 | H. Bilgram | Process of shaping gear-teeth |
| | 1,219,481 | Mar. 20, 1917 | G. Leander, L.A. Peterson | Method of Chamfering the Teeth of Gears |
| | 1,271,495 | Jul. 02, 1918 | F.A. Ward | Method for Grinding Spline Shafts and Other Interrupted Cycindrical Bodies |
| | 1,536,736 | May 05, 1925 | A.W. Erdman, P.F. Vokal | Process of Making Milling Cutters |
 | 1,989,651 | Jan. 29, 1935 | R.S. Drummond | Method of finishing gears |
| | 2,003,263 | May 28, 1935 | H.Q. Munn | Adjustable Work Carrying Table |
| | 2,123,717 | Jul. 12, 1938 | W.F. Dalzen | Gear Finishing Machine |
| | 2,135,894 | Nov. 08, 1938 | E.C. Head | Machine for forming spiral bevel gear cutters |
| | 2,164,642 | Jul. 04, 1939 | J.C. Drader | Method and Means for Constructing Gear Finishing Tools |
| | 2,245,654 | Jun. 17, 1941 | J.D. Rovick, J.C. Drader | Gear Lapping and Finishing Machine |
