Granted Patent
Utility
US 6,292,561 · App. 08/782,244
Digital mobile phone with a plurality of switchable subscriber identification modules (SIMS)
Inventor:
Keith Benson
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Jan 14, 1997
Inventor
Keith Benson
Assignee (at issue)
Funge 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.