Granted Patent
Utility
US 4,282,393 · App. 05/954,493
Electrode melting-Z type electrode firing with continuous zones
Inventor:
Michael Williamson
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Oct 25, 1978
Inventor
Michael Williamson
Assignee (at issue)
Owens-Corning Fiberglas Corp.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.