Granted Patent
Utility
US 6,477,384 · App. 09/125,101
Checking the presence of mobile stations communicating on a direct mode channel
Inventors:
Osmo Schroderus, Kimmo Kinnunen
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Oct 6, 1998
Inventors
Osmo Schroderus
Kimmo Kinnunen
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.