Granted Patent
Utility
US 6,618,471 · App. 09/164,763
Method and system for measuring usage of advanced intelligent network services
Inventors:
Robert B. Howell, Donald E. Gillespie
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Oct 1, 1998
Inventors
Robert B. Howell
Donald E. Gillespie
Assignee (at issue)
Qwest Communications International 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.