Granted Patent
Utility
US 4,456,981 · App. 06/359,642
Modulation system for optical recording
Inventors:
Dorrel R. Silvy, William J. Stanis
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Mar 19, 1982
Inventors
Dorrel R. Silvy
William J. Stanis
Assignee (at issue)
Magnetic Peripherals, Inc.
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.