| Patents for William D. Zettler |
Patents 1 -
7
of 7
      |
| Picture | Number | Date | Patentee | Title |
| | 2,924,152 | Feb. 09, 1960 | W.D. Zettler | Drawbolt for Machine Tools |
| | 3,198,078 | Aug. 03, 1965 | W.D. Zettler, G.H. Schurger | Machine Tool Control Center |
| | 3,232,143 | Feb. 01, 1966 | W.D. Zettler, G.h. Schurger | Control for Machine Tools |
| | 3,688,387 | Sep. 05, 1972 | W.D. Zettler | Shuttle Type Automatic Tool Changer |
| | 3,818,797 | Jun. 25, 1974 | W.D. Zettler | Drawbolt for Machine Tool Spindles |
| | 3,824,890 | Jul. 23, 1974 | E.E. Johnson, W.D. Zettler | Chip Guard for Machine Tools |
| | 4,141,134 | Feb. 27, 1979 | F.L. Schmidt, D.J. Seicher, E.F. Woytych, W.D. Zettler | Tool Changer Attachment for Multi Function Machine Tools |
