Granted Patent
Utility
US 4,934,975 · App. 07/381,337
Method for making mask support structure for a tension mask color cathode ray tube
Inventors:
Kenneth L. Fritsch, Raymond G. Capek
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Jul 18, 1989
Inventors
Kenneth L. Fritsch
Raymond G. Capek
Assignee (at issue)
Zenith Electronics LLC
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.