Granted Patent
Utility
US 4,294,603 · App. 06/071,923
Glass forehearth construction
Inventors:
Frederick W. Winzer, James Robert Ault
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Sep 4, 1979
Inventors
Frederick W. Winzer
James Robert Ault
Assignee (at issue)
Emhart Industries, Inc.
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.