Granted Patent
Utility
US 4,280,931 · App. 06/066,356
Method and composition for electrically resistive material for television cathode ray tubes
Inventors:
Dale Delsing, Mark Fogelson
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Aug 14, 1979
Inventors
Dale Delsing
Mark Fogelson
Assignee (at issue)
Zenith Radio Corporation
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.