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