| All Patents in class 408/234 |
Patents 46 -
60
of 109
      |
| Number | Date | Patentee | Title | Type |
| 1,724,430 | Aug. 13, 1929 | W.G. Hoelscher, A.M. Sosa | Drilling Machinery | radial drill presses |
| 1,764,810 | Jun. 17, 1930 | W.G. Hoelscher, A.M. Sosa | Elevating Mechanism for Drilling Machines | radial drill presses |
| 1,821,436 | Sep. 01, 1931 | J.J. Holloway | Portable power driven tool | handheld power drills |
| 1,838,995 | Dec. 29, 1931 | W.M. Fairbairn, A.M. Johnson | Spindle feed mechanism for machine tools | nut or bolt making machines |
| 1,868,440 | Jul. 19, 1932 | E.A. Arp | Boring machine and method | automotive tools |
| 1,881,675 | Oct. 11, 1932 | D.C. Klausmeyer | Head mount with roller bearing gib | radial drill presses |
| 1,881,993 | Oct. 11, 1932 | E.A. Arp | Tool attachment device | automotive tools |
| RE18,832 | May 16, 1933 | E.A. Arp | Tool attachment device | automotive tools |
| 1,936,384 | Nov. 21, 1933 | C.J. Davis | Metal working machinery | horizontal boring mills |
| 2,000,421 | May 07, 1935 | A.M. Sosa, J.H. McKewen, L.L. Schauer | Duplex control for radial drills | radial drill presses |
| 2,065,476 | Dec. 22, 1936 | L.L. Schauer | Simplified control for drill spindles | radial drill presses |
| 2,068,594 | Jan. 19, 1937 | J.F. Buhr | Bearing Structure for Rotatable Spindles and the Like | metalworking machine mechanisms |
| 2,078,598 | Apr. 27, 1937 | J.Y. Blazek, R.J. Kuschel | Clamping means | vehicle mechanic |
| 2,079,372 | May 04, 1937 | G.W. Emrick | Tapping machine | tapping machines |
| 2,122,966 | Jul. 05, 1938 | H.E. Tautz | Drill press table operating means | drill presses |
