Granted Patent
Utility
US 4,477,894 · App. 06/406,883
Protective cartridge for disc record
Inventor:
Stanley P. Clurman
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Aug 10, 1982
Inventor
Stanley P. Clurman
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.