Granted Patent
Utility
US 4,300,071 · App. 06/101,959
Four-corner shadow mask suspension system for television cathode ray tubes
Inventors:
Lawrence W. Dougherty, Kazimir Palac
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Dec 10, 1979
Inventors
Lawrence W. Dougherty
Kazimir Palac
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.