| All Patents in class 408/4 |
Patents 1 -
10
of 26
      |
| Picture | Number | Date | Patentee | Title |
 | 1,337 | Sep. 25, 1839 | C. Whitsitt | Rotary Saw for Cutting Round Tenons, &c. |
 | 1,679,027 | Jul. 31, 1928 | C. Gabrielson, A. Meldrum | Drilling machine |
| | 1,909,766 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool |
 | 1,918,150 | Jul. 11, 1933 | G. Swahnberg, E.J. Kingsbury | Multiple head automatic drilling machine |
| | 1,948,618 | Feb. 27, 1934 | D.C. Klausmeyer | Interlocked arm clamp and elevating control |
| | 1,956,540 | Apr. 24, 1934 | A.M. Sosa | Electric arm clamping and elevating mechanism |
| | 1,987,675 | Jan. 15, 1935 | K.F. Gallimore | Spindle Feed and Drive Mechanism for Machine Tools |
| | 2,019,509 | Nov. 05, 1935 | L.L. Schauer, A.M. Sosa | Hydraulic column and arm clamp with elevating control |
| | 2,020,785 | Nov. 12, 1935 | D.C. Klausmeyer | Interlocked propelling and clamping means for mobile drills |
| | 2,021,388 | Nov. 19, 1935 | L.L. Schauer | Hydraulic arm translating means for radial drills |
