| All Patents in class 408/4 |
Patents 1 -
15
of 25
      |
| Number | Date | Patentee | Title | Type |
| 1,337 | Sep. 25, 1839 | C. Whitsitt | Rotary Saw for Cutting Round Tenons, &c. | hollow bits |
| 1,679,027 | Jul. 31, 1928 | C. Gabrielson, A. Meldrum | Drilling machine | drill presses |
| 1,909,766 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool | tapping machines |
| 1,918,150 | Jul. 11, 1933 | G. Swahnberg, E.J. Kingsbury | Multiple head automatic drilling machine | multiple spindle drill presses |
| 1,948,618 | Feb. 27, 1934 | D.C. Klausmeyer | Interlocked arm clamp and elevating control | radial drill presses |
| 1,956,540 | Apr. 24, 1934 | A.M. Sosa | Electric arm clamping and elevating mechanism | radial drill presses |
| 1,987,675 | Jan. 15, 1935 | K.F. Gallimore | Spindle Feed and Drive Mechanism for Machine Tools | metalworking power transmission |
| 2,019,509 | Nov. 05, 1935 | L.L. Schauer, A.M. Sosa | Hydraulic column and arm clamp with elevating control | radial drill presses |
| 2,020,785 | Nov. 12, 1935 | D.C. Klausmeyer | Interlocked propelling and clamping means for mobile drills | radial drill presses |
| 2,021,388 | Nov. 19, 1935 | L.L. Schauer | Hydraulic arm translating means for radial drills | radial drill presses |
| 2,083,023 | Jun. 08, 1937 | W.M. Fairbairn, A.M. Johnson | Machine tool | multiple spindle drill presses |
| 2,251,015 | Jul. 29, 1941 | K.F. Gallimore | Machine tool | horizontal boring mills |
| 2,263,404 | Nov. 18, 1941 | O.W. Barker, J.B. Armitage | Boring and Milling Machine | milling machines |
| 2,318,336 | May 04, 1943 | L.L. Schauer | Tapping machine | tapping machines |
| 2,323,488 | Jul. 06, 1943 | L.L. Schauer | Automatic reverse for tapping machines | tapping machines |
