Granted Patent
Utility
US 4,635,223 · App. 06/876,290
Fail safe protection circuitry for a commerical microprocessor in encryption equipment
Inventors:
Susan L. Boone, Hugh D. Stuart
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jun 18, 1986
Inventors
Susan L. Boone
Hugh D. Stuart
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.