Granted Patent
Utility
US 4,247,733 · App. 06/069,938
Electrically heated glass forehearth
Inventor:
James F. Stevenson
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Aug 27, 1979
Inventor
James F. Stevenson
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.