Granted Patent
Utility
US 4,891,028 · App. 07/336,283
Shielding means and process for use in the manufacture of tension mask color cathode ray tubes
Inventors:
Allan D. Kautz, Johann Steiner
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Apr 11, 1989
Inventors
Allan D. Kautz
Johann Steiner
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.