Granted Patent
Utility
US 4,499,996 · App. 06/566,886
Protective cartridge for disc record
Inventor:
Peter Coyle
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Dec 29, 1983
Inventor
Peter Coyle
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.