Granted Patent
Utility
US 5,907,804 · App. 08/754,553
Checking the identification number of a mobile subscriber
Inventors:
Osmo Schroderus, Pasi Hakala
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: Nov 21, 1996
Inventors
Osmo Schroderus
Pasi Hakala
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.