Granted Patent
Utility
US 6,603,760 · App. 09/455,611
System and method for gradual transition of local phone services from PSTN to next generation network
Inventor:
Darek A. Smyk
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Dec 7, 1999
Inventor
Darek A. Smyk
Assignee (at issue)
Telcordia 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.