| All Patents in class 451/47 |
Patents 1 -
15
of 22
      |
| Number | Date | Patentee | Title | Type |
| 749,683 | Jan. 12, 1904 | H. Bilgram | Process of shaping gear-teeth | gear making machines |
| 1,219,481 | Mar. 20, 1917 | G. Leander, L.A. Peterson | Method of Chamfering the Teeth of Gears | gear making machines |
| 1,271,495 | Jul. 02, 1918 | F.A. Ward | Method for Grinding Spline Shafts and Other Interrupted Cycindrical Bodies | grinder dressers |
| 1,536,736 | May 05, 1925 | A.W. Erdman, P.F. Vokal | Process of Making Milling Cutters | milling machine cutters |
| 1,989,651 | Jan. 29, 1935 | R.S. Drummond | Method of finishing gears | gear making machines |
| 2,003,263 | May 28, 1935 | H.Q. Munn | Adjustable Work Carrying Table | metalworking machine mechanisms |
| 2,123,717 | Jul. 12, 1938 | W.F. Dalzen | Gear Finishing Machine | gear making machines |
| 2,135,894 | Nov. 08, 1938 | E.C. Head | Machine for forming spiral bevel gear cutters | sharpening machines |
| 2,164,642 | Jul. 04, 1939 | J.C. Drader | Method and Means for Constructing Gear Finishing Tools | gear cutting tools |
| 2,245,654 | Jun. 17, 1941 | J.D. Rovick, J.C. Drader | Gear Lapping and Finishing Machine | gear lapping machines |
| 2,257,195 | Sep. 30, 1941 | J.D. Rovick | Internal Gear Finishing Machine | gear making machines |
| 2,294,733 | Sep. 01, 1942 | S.G. Brady | Grinding Machine | gear grinding machines |
| 2,346,865 | Apr. 18, 1944 | H. Pelphrey | Method of Forming Gear Cutters | gear cutting tools |
| 2,348,845 | May 16, 1944 | H. Pelphrey | Machine for Forming Gears | gear making machines |
| 2,351,842 | Jun. 20, 1944 | P.F. Seibold | Gear Grinding Machine | gear grinding machines |
