| All Patents in class 408/238 |
Patents 16 -
23
of 23
      |
| Number | Date | Patentee | Title | Type |
| 1,917,842 | Jul. 11, 1933 | A.M. Johnson | Drilling machine spindle | drill presses |
| 2,433,127 | Dec. 23, 1947 | R.B. Kinzbach | Machine Tool Holder | metalworking machine tool holders |
| 2,442,444 | Jun. 01, 1948 | H.E. Tautz | Boring head | boring heads |
| 2,652,634 | Sep. 22, 1953 | H.R. De Vlieg | Presetting device for cutting tools | |
| 3,041,898 | Jul. 03, 1962 | B.R. Better | Tool Centering Device | tool centering apparatus |
| 3,174,222 | Mar. 23, 1965 | W.M. Pohl | Tool Changing Machine Tool | milling machines |
| 3,446,117 | May 27, 1969 | E.P. Bullard, III | Retractable Tool Support | metalworking machine mechanisms |
| 3,752,595 | Aug. 14, 1973 | J.L. Kirschnik, R.T. Woythal | Adapter for Drill Speeder | metalworking machine tool holders |
