Granted Patent
Utility
US 5,495,235 · App. 07/954,204
Access control system with lockout
Inventors:
Sanja Durinovic-Johri, Patricia E. Wirth
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Sep 30, 1992
Inventors
Sanja Durinovic-Johri
Patricia E. Wirth
Assignee (at issue)
AT&T CORP.
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.