Granted Patent
Utility
US 5,752,196 · App. 08/676,239
Maintaining group data in a mobile communications system
Inventors:
Jouko Ahvenainen, Anna Sillanpaa
Patented Case
View Patent ↗
Granted: May 12, 1998
Filed: Jul 17, 1996
Inventors
Jouko Ahvenainen
Anna Sillanpaa
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.