Granted Patent
Utility
US 4,998,901 · App. 07/405,378
Method and apparatus for making flat tension mask color cathode ray tubes
Inventors:
Robert P. Adler, James R. Fendley, Howard G. Lange, Charles J. Prazak, III, Johann Steiner, Paul Strauss
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: Sep 8, 1989
Inventors
Robert P. Adler
James R. Fendley
Howard G. Lange
Charles J. Prazak, III
Johann Steiner
Paul Strauss
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.