Granted Patent
Utility
US 4,514,658 · App. 06/480,762
Mesh lens focus mask for a cathode-ray tube
Inventor:
Stanley Bloom
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: Mar 31, 1983
Inventor
Stanley Bloom
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.