| All Patents in class 408/158 |
Patents 16 -
30
of 33
      |
| Number | Date | Patentee | Title | Type |
| 1,353,048 | Sep. 14, 1920 | V.R. Koontz | Collapsible tap | taps and dies |
| 1,362,800 | Dec. 21, 1920 | P. Jardine | Collapsible tap | |
| 1,415,013 | May 09, 1922 | R.A. Boehm | Collapsible Tap | taps and dies |
| 1,527,185 | Feb. 24, 1925 | L.S. Hall | Pipe-threading machine | pipe threading machines |
| 1,576,652 | Mar. 16, 1926 | L.S. Hall | Pipe Threading Machine | pipe threading machines |
| 1,797,422 | Mar. 24, 1931 | J.V. Jardine | Pipe-threading apparatus | |
| 1,804,459 | May 12, 1931 | R.R. Finn, E.T. Bysshe | Screw-Cutting Die | tapping heads and chucks |
| 1,953,529 | Apr. 03, 1934 | E.T. Bysshe, R.R. Finn | Automatic Die | taps and dies |
| 2,097,898 | Nov. 02, 1937 | O. Severson | Adjustable Hollow Mill | milling machine cutters |
| 2,179,573 | Nov. 14, 1939 | R.B. Criddle | Retractable Tool and Holder Therefor | metalworking machine tool holders |
| 2,182,478 | Dec. 05, 1939 | R.G. Jacobson | Boring Head | boring heads |
| 2,495,291 | Jan. 24, 1950 | M.J. Schlitters | Recessing Tool Holder | lathe tool holders and tool posts |
| 2,837,941 | Jun. 10, 1958 | M.J. Schlitterd | Recessing Tool Holder | metalworking machine tool holders |
| 2,837,974 | Jun. 10, 1958 | M.J. Schlitters | Holder for Rotary Recessing Tool | metalworking machine tool holders |
| 2,940,367 | Jun. 14, 1960 | S.A. Cogsdill | Deburring Tool | deburring tools |
