Granted Patent
Utility
US 5,867,562 · App. 08/633,507
Call processing system with call screening
Inventor:
Gordon F. Scherer
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Apr 17, 1996
Inventor
Gordon F. Scherer
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.