| All Patents in class 408/117 |
Patents 31 -
41
of 41
      |
| Number | Date | Patentee | Title | Type |
| 2,012,047 | Aug. 20, 1935 | J.R. Johnson | Boring Head | boring heads |
| 2,068,594 | Jan. 19, 1937 | J.F. Buhr | Bearing Structure for Rotatable Spindles and the Like | metalworking machine mechanisms |
| 2,153,054 | Apr. 04, 1939 | H.J. Smith | Die stock and tap wrench | taps and dies |
| 2,213,579 | Sep. 03, 1940 | G.W. Emrick | Variable multiple head | multiple spindle drilling heads |
| 2,349,240 | May 23, 1944 | R.B. Aiman | Adjustable Multiple Spindle Drill Head | multiple spindle drilling heads |
| 2,423,223 | Jul. 01, 1947 | E.P. Bullard, F.H. Mussler | Machine Tool | |
| 2,452,709 | Nov. 02, 1948 | R.B. Aiman | Lubricating System for Adjustable Multiple Spindle Drill Head | metalworking machine lubrication |
| 2,522,736 | Sep. 19, 1950 | F.G. Zagar | Parallel motion multiple spindle head | multiple spindle drilling heads |
| 2,848,913 | Aug. 26, 1958 | N.C. Thomsen | Self Centering Multiple Boring Tool Holder | lathe tool holders and tool posts |
| 3,174,222 | Mar. 23, 1965 | W.M. Pohl | Tool Changing Machine Tool | milling machines |
| 3,296,896 | Jan. 10, 1967 | H.R. Uhtenwoldt | Turret Drills | multiple spindle drill presses |
