Granted Patent
Utility
US 4,340,959 · App. 06/108,030
Optical recording medium with a thick overcoat
Inventor:
Leonard Levin
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Dec 28, 1979
Inventor
Leonard Levin
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.