Granted Patent
Utility
US 5,832,090 · App. 08/513,646
Radio frequency transponder stored value system employing a secure encryption protocol
Inventor:
William B. Raspotnik
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Aug 10, 1995
Inventor
William B. Raspotnik
Assignee (at issue)
HID 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.