Granted Patent
Utility
US 4,719,594 · App. 06/769,227
Grooved optical data storage device including a chalcogenide memory layer
Inventors:
Rosa Young, Napoleon P. Formigoni
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: Aug 26, 1985
Inventors
Rosa Young
Napoleon P. Formigoni
Assignee (at issue)
Energy Conversion Devices, 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.