| All Patents in class 409/48 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
| | 490,503 | Jan. 24, 1893 | G.S. Rominger | Worm Gear Cutting Machine |
| | 806,075 | Nov. 28, 1905 | T. Fawcus | Spiral Gear Cutting Machine |
| | 921,593 | May 11, 1909 | A.T. Collier | Apparatus for Cutting Globoig Worms |
| | 1,092,571 | Apr. 07, 1914 | C.J. Halborg | Machine for Backing Off Hobs or Cutters for Cutting Gears |
| | 1,190,391 | Jul. 11, 1916 | E.R. Fellows | Means for Generating and Cutting Irregular Gears |
 | 1,221,303 | Apr. 03, 1917 | W.F. Folmer | Gear Cutting Machine |
 | 1,798,059 | Mar. 24, 1931 | M.F. Hill, H. Bilgram | Machine for making rotors |
| | 2,348,845 | May 16, 1944 | H. Pelphrey | Machine for Forming Gears |
 | 2,495,927 | Jan. 31, 1950 | F.R. Francis | Lathe machine |
| | 2,859,665 | Nov. 11, 1958 | B.H. Johnson, F.E. Birch | Apparatus for Relieving Portions of the Thread Flanks of Double Enveloping Worm Elements |
