Granted Patent
Utility
US 4,602,186 · App. 06/641,697
Insulating mount for a CRT Einzel lens focus mask
Inventor:
Kern K. Nan Chang
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Aug 17, 1984
Inventor
Kern K. Nan Chang
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.