Granted Patent
Utility
US 6,545,995 · App. 09/319,195
Maintenance of group call in mobile communication system
Inventors:
Kimmo Kinnunen, Osmo Schroderus
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Jun 29, 1999
Inventors
Kimmo Kinnunen
Osmo Schroderus
Assignee (at issue)
Nokia
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.