Granted Patent
Utility
US 4,957,580 · App. 07/252,829
Method for making an optical data card
Inventors:
Jerome Drexler, Joseph Arnold
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Oct 3, 1988
Inventors
Jerome Drexler
Joseph Arnold
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.