| All Patents in class 470/99 |
Patents 16 -
24
of 24
      |
| Number | Date | Patentee | Title | Type |
| 1,998,275 | Apr. 16, 1935 | G.W. Emrick | Multiple tapping device | tapping heads and chucks |
| 2,096,754 | Oct. 26, 1937 | A. Oberhoffken | Machine Tool | milling machines |
| 2,130,809 | Sep. 20, 1938 | C.E. Miller | Multiple Spindle Automatic Lathe | multiple spindle lathes |
| 2,213,579 | Sep. 03, 1940 | G.W. Emrick | Variable multiple head | multiple spindle drilling heads |
| 2,236,440 | Mar. 25, 1941 | C.E. Miller | Automatic Multiple Spindle Machine | automatic lathes |
| 2,317,099 | Apr. 20, 1943 | W.F. Groene, H.J. Siekmann | Step threading machine | gunsmith |
| 2,348,364 | May 09, 1944 | H.W. Ruppel | Turret actuating mechanism | turret lathes |
| 2,614,446 | Oct. 21, 1952 | C.E. Miller | Multiple Spindle Lathe | multiple spindle lathes |
| 2,615,183 | Oct. 28, 1952 | E.H. Johnson, A.C. Lindmark | Tapping Attachment | |
