Granted Patent
Utility
US 5,168,522 · App. 07/755,970
Wireless telephone with frequency inversion scrambling
Inventors:
Joseph F. Simanis, Robert N. Weisshappel
Patented Case
View Patent ↗
Granted: Dec 1, 1992
Filed: Sep 6, 1991
Inventors
Joseph F. Simanis
Robert N. Weisshappel
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.