Granted Patent
Utility
US 4,569,055 · App. 06/646,597
Forehearth electrode firing
Inventor:
Michael Williamson
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Aug 31, 1984
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.