| All Patents in class 408/139 |
Patents 16 -
30
of 30
      |
| Number | Date | Patentee | Title | Type |
| 921,977 | May 18, 1909 | C.L. Goodrich | Tool Holder | tap and die holders |
| 2,147,203 | Feb. 14, 1939 | O. Kylin | Tap holder | metal lathe accessories and attachments |
| 2,184,394 | Dec. 26, 1939 | W. Moretti | Power driven screw gun with clutch | handheld power tools |
| 2,206,047 | Jul. 02, 1940 | J.E. Poorman | Tap and Die Holder | tap and die holders |
| 2,333,868 | Nov. 09, 1943 | O. Kylin | Releasing Tap Holder | |
| 2,432,443 | Dec. 09, 1947 | H.H. Ranney | Releasing Tap and Die Holder | tap and die holders |
| 2,450,238 | Sep. 28, 1948 | B.H. Jordan | Tap Holder | |
| 2,574,016 | Nov. 06, 1951 | F.G. Burg | Flexible toolholder | drill presses |
| 2,764,767 | Oct. 02, 1956 | W.J. Adlaf | Releasable Screw Threading Tool Holder | tapping heads and chucks |
| 2,858,553 | Nov. 04, 1958 | J.A. Bearhalter | Releasable Thread Cutting Tool Holder With Reversible Clutch Means for Opposite Hand Thread Cutting | tapping heads and chucks |
| 2,940,093 | Jun. 14, 1960 | R.B. Pealer | Drive Release for Geared Threader | pipe threading machines |
| 3,051,013 | Aug. 28, 1962 | A.I. Zagar | Forward and reverse friction drive tapping attachment | tapping machines |
| 3,162,283 | Dec. 22, 1964 | A.G. Troka, H.G. Saul | Dual Purpose Chuck | drill press chucks |
| 3,174,222 | Mar. 23, 1965 | W.M. Pohl | Tool Changing Machine Tool | milling machines |
| 3,371,559 | Mar. 05, 1968 | J.A. Scholl | Means for automatic tool feed and retraction control of boring and facing heads | boring heads |
