Granted Patent
Utility
US 6,424,652 · App. 09/082,180
Method, system and apparatus for telecommunications control
Inventor:
Joseph Michael Christie
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: May 20, 1998
Inventor
Joseph Michael Christie
Assignee (at issue)
SPRINT COMMUNICATIONS COMPANY, L.P.
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.