| Patents for ETTCO Tool & Machine Co., Inc. |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 2,012,340 | Aug. 27, 1935 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 2,035,224 | Mar. 24, 1936 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 2,045,452 | Jun. 23, 1936 | G.W. Emrick | Clutch | tapping heads and chucks |
| 2,045,453 | Jun. 23, 1936 | G.W. Emrick | Method of making friction clutch elements | tapping heads and chucks |
| 2,079,371 | May 04, 1937 | G.W. Emrick | Tapping machine | tapping machines |
| 2,079,372 | May 04, 1937 | G.W. Emrick | Tapping machine | tapping machines |
| 2,141,209 | Dec. 27, 1938 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 2,162,250 | Jun. 13, 1939 | G.W. Emrick | Clutch mechanism for tapping attachments | tapping heads and chucks |
| 2,162,251 | Jun. 13, 1939 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 2,213,579 | Sep. 03, 1940 | G.W. Emrick | Variable multiple head | multiple spindle drilling heads |
| 2,228,622 | Jan. 14, 1941 | G.W. Emrick | Clutch mechanism | tapping heads and chucks |
| 2,231,465 | Feb. 11, 1941 | G.W. Emrick | Tapping attachment | tapping heads and chucks |
| 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 |
