| Patents Granted on 1980-12-09 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 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 |
