Granted Patent
Utility
US 5,754,652 · App. 08/356,017
Method and apparatus for secure pin entry
Inventor:
Gordon Wilfong
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Dec 14, 1994
Inventor
Gordon Wilfong
Assignee (at issue)
LUCENT 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.