Granted Patent
Utility
US 5,590,184 · App. 08/398,251
Communications privacy protection system by replacing calling party number with non-assigned number
Inventor:
Thomas B. London
Patented Case
View Patent ↗
Granted: Dec 31, 1996
Filed: Mar 3, 1995
Inventor
Thomas B. London
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.