Granted Patent
Utility
US 4,621,214 · App. 06/602,155
Color selection means having a charged insulator portion for a cathode-ray tube
Inventors:
Stanley Bloom, Eric F. Hockings
Patented Case
View Patent ↗
Granted: Nov 4, 1986
Filed: Apr 19, 1984
Inventors
Stanley Bloom
Eric F. Hockings
Assignee (at issue)
RCA 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.