Granted Patent
Utility
US 5,168,520 · App. 07/670,705
Method and apparatus for personal identification
Inventor:
Kenneth P. Weiss
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Mar 18, 1991
Inventor
Kenneth P. Weiss
Assignee (at issue)
Security Dynamics Technologies, Inc.
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.