Granted Patent
Utility
US 5,606,604 · App. 08/166,414
System and method for preventing fraud upon PBX through a remote maintenance or administration port
Inventors:
Roberta S. Rosenblatt, Joseph Lai
Patented Case
View Patent ↗
Granted: Feb 25, 1997
Filed: Dec 13, 1993
Inventors
Roberta S. Rosenblatt
Joseph Lai
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.