Granted Patent
Utility
US 6,199,761 · App. 09/236,769
Validation method for electronic cash cards and digital identity cards utilizing optical data storage
Inventor:
Jerome Drexler
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Jan 25, 1999
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.