Granted Patent
Utility
US 6,047,174 · App. 09/033,314
Cellular telephone anti-fraud system
Inventor:
Max B. Frederick
Patented Case
View Patent ↗
Granted: Apr 4, 2000
Filed: Mar 2, 1998
Inventor
Max B. Frederick
Assignee (at issue)
Corsair Communications, 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.