Granted Patent
Utility
US 4,910,725 · App. 06/920,809
Optical recording method for data cards
Inventors:
Jerome Drexler, Joseph Arnold
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Oct 17, 1986
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.