Granted Patent
Utility
US 6,393,269 · App. 09/172,934
Signaling system and method for network-based pre-paid wireless telephone service
Inventors:
Peter Hartmaier, Michael Wilhoite
Patented Case
View Patent ↗
Granted: May 21, 2002
Filed: Oct 14, 1998
Inventors
Peter Hartmaier
Michael Wilhoite
Assignee (at issue)
Openwave Systems 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.