Granted Patent
Utility
US 6,389,113 · App. 09/440,952
Dual-alerting paging system and monitoring of return call
Inventor:
David Phillip Silverman
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Nov 16, 1999
Inventor
David Phillip Silverman
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.