Granted Patent
Utility
US 5,115,467 · App. 07/644,923
Signal encryption apparatus for generating common and distinct keys
Inventors:
James Esserman, Christopher J. Bennett
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Jan 23, 1991
Inventors
James Esserman
Christopher J. Bennett
Assignee (at issue)
General Instrument Corporation
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.