| Patents for ETTCO Tool Co., Inc. |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 2,767,992 | Oct. 23, 1956 | G.W. Emrick | Chuck device for taps | drill press chucks |
| 2,863,339 | Dec. 09, 1958 | M.H. Emrick | Hydraulic air drilling unit | multiple spindle drill presses |
| 2,953,122 | Sep. 20, 1960 | A.I. Zagar | Hydraulic check for air drilling units | multiple spindle drill presses |
| 2,960,344 | Nov. 15, 1960 | A.I. Zagar | Adjustable collet-type chuck | collets and collet holders |
| 3,005,526 | Oct. 24, 1961 | A.I. Zagar | Conical clutch sleeves for tapping attachments | tapping machines |
| 3,005,527 | Oct. 24, 1961 | A.I. Zagar | Positive drive tapping attachments | tapping machines |
| 3,030,818 | Apr. 24, 1962 | A.I. Zagar | Positive drive tapping attachments | tapping machines |
| 3,051,013 | Aug. 28, 1962 | A.I. Zagar | Forward and reverse friction drive tapping attachment | tapping machines |
| 3,064,497 | Nov. 20, 1962 | A.I. Zagar | Extensible tool supporting arm for drill and tap drive heads | tapping machines |
| 4,786,221 | Nov. 22, 1988 | K.L. March | Quick release chuck mechanism and method for achieving interchange ability of tool inserts therein | tapping machines |
| 4,795,291 | Jan. 03, 1989 | K.L. March | Method for achieving interchangeability of tool inserts | tapping machines |
