Granted Patent
Utility
US 4,547,876 · App. 06/542,028
Optical recording medium and information record and method of making same
Inventor:
Michael Ettenberg
Patented Case
View Patent ↗
Granted: Oct 15, 1985
Filed: Oct 14, 1983
Inventor
Michael Ettenberg
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.