Granted Patent
Utility
US 6,449,247 · App. 09/199,119
System and method for maintaining call services for remote users in the event of a communication failure
Inventors:
Marcel Manzardo, Abid Farooq
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Nov 24, 1998
Inventors
Marcel Manzardo
Abid Farooq
Assignee (at issue)
Siemens Information and Communication Networks, 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.