| All Patents in class 408/34 |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
 | 145,923 | Dec. 23, 1873 | A. Woodworth | Metal-Drilling Machines |
 | 817,587 | Apr. 10, 1906 | M. Nelson | Machine for drilling nuts and the like |
| | 1,574,727 | Feb. 23, 1926 | E.P. Bullard, Jr. | Multiple-Spindle Continuous-Drilling Tool |
 | 1,877,277 | Sep. 13, 1932 | F.M. Davis | Vertical continuous drilling machines |
| | 1,877,560 | Sep. 13, 1932 | F.M. Davis | Vertical Continuous Milling Machine |
| | 2,027,023 | Jan. 07, 1936 | J. Coulter | Multiple Spindle Boring Machine |
 | 2,697,952 | Dec. 28, 1954 | G.L. Otto | Continuously operating machine tool |
