Granted Patent
Utility
US 5,901,212 · App. 08/794,722
Apparatus for blocking voice band signals when receiving caller identification information for a waiting call
Inventors:
Robert Clair True, Brian Albert Wittman
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: Feb 3, 1997
Inventors
Robert Clair True
Brian Albert Wittman
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.