Granted Patent
Utility
US 4,608,515 · App. 06/729,163
Cathode-ray tube having a screen grid with asymmetric beam focusing means and refraction lens means formed therein
Inventor:
Hsing-Yao Chen
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: Apr 30, 1985
Inventor
Hsing-Yao Chen
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.