| Patents Granted on 1980-12-?? |
Patents 1 -
11
of 11
      |
| Number | Date | Patentee | Title | Type |
| 4,236,430 | Dec. 02, 1980 | J.A. Hitt | Swing-away hold-down construction for bar or billet shear | metal shearing machines |
| 4,237,853 | Dec. 09, 1980 | R.B. Mcconnell | Dresser design | grinder dressers |
| 4,238,034 | Dec. 09, 1980 | R.B. Clegg, R. Johnstone, C.B. Sipek | Automatic Tool Changer for Machine Tools | tool changers and storage mechanisms |
| 4,238,124 | Dec. 09, 1980 | T.J. Eichfeld, H.C. Disston, Jr. | Work holder | drill press accessories |
| 4,238,167 | Dec. 09, 1980 | J.J. Hughes, D.M. Brugger | Toolholder Adapter | metalworking machine tool holders |
| 4,238,784 | Dec. 09, 1980 | H.C. Thomas, H.J. Keen | Electronic Measuring System with Pulsed Power Supply and Stability Sensing | electrical measuring apparatus |
| CA-1,091,484 | Dec. 16, 1980 | E.J. Kielma, A.J. Schabowski | Multiple spindle machine tool | tool changers and storage mechanisms |
| 4,239,450 | Dec. 16, 1980 | L.J. Geitner, C.C. Herbeck | Adjusting mechanism for variable inlet vane | |
| 4,240,232 | Dec. 23, 1980 | J.C. Chwae | Coated Abrasive Superfinishing Stone and Method of Making Same | grinder wheels |
| CA-1,092,333 | Dec. 30, 1980 | F.E. Dailey | Closed loop machining system | multiple station machines |
| 4,242,018 | Dec. 30, 1980 | H. Schürfeld | Boring Tool | |
