Granted Patent
Utility
US 5,777,558 · App. 08/609,754
Method for detecting fraudulent use of a communication system
Inventors:
Frank C. Pennypacker, Richard J. Corrigan, Timothy M. Burke
Patented Case
View Patent ↗
Granted: Jul 7, 1998
Filed: Feb 29, 1996
Inventors
Frank C. Pennypacker
Richard J. Corrigan
Timothy M. Burke
Assignee (at issue)
Motorola, 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.