| All Patents in class 408/9 |
Patents 1 -
10
of 20
      |
| Picture | Number | Date | Patentee | Title |
| | 966,217 | Aug. 02, 1910 | F.W. King | Electric drill |
 | 1,222,954 | Apr. 17, 1917 | J.F. Judd, J.J. Hogan | Threading mechanism for automatic lathes |
 | 1,550,609 | Aug. 18, 1925 | H.D. Corwin, W.R. Fox | Metal-working machine |
 | 1,607,614 | Nov. 23, 1926 | J.H. Graham | Tapping machine |
| | 1,679,529 | Aug. 07, 1928 | A.M. Johnson | Automatic machine tool |
 | 2,000,553 | May 07, 1935 | C.R. Alden | Machine tool |
| | 2,089,228 | Aug. 10, 1937 | L.L. Schauer, J.H. McKewen | Combination drilling and tapping control |
| | 2,161,548 | Jun. 06, 1939 | C.E. Miller | Threading Mechanism |
 | 2,189,422 | Feb. 06, 1940 | G.W. Irwin | Combined drilling and tapping machine |
| | 2,253,413 | Aug. 19, 1941 | H.R. Young | Spindle Drive Control for Machine Tools |
