Granted Patent
Utility
US 6,345,181 · App. 09/194,830
Charging criteria for a call in a cellular mobile network
Inventors:
Risto Janhonen, Markku Tuohino, Veli Turkulainen
Patented Case
View Patent ↗
Granted: Feb 5, 2002
Filed: Dec 3, 1998
Inventors
Risto Janhonen
Markku Tuohino
Veli Turkulainen
Assignee (at issue)
Nokia Telecommunications Oy
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.