Granted Patent
Utility
US 4,556,820 · App. 06/565,284
Image display including a light-absorbing matrix of zinc-iron sulfide
Inventor:
Robert P. Thompson
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Dec 27, 1983
Inventor
Robert P. Thompson
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.