Granted Patent
Utility
US 4,319,252 · App. 06/170,801
Optical data storage and recording medium having a replaceable protective coverplate
Inventor:
Jerome Drexler
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: Jul 21, 1980
Inventor
Jerome Drexler
Assignee (at issue)
Drexler Technology 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.