Granted Patent
Utility
US 4,897,842 · App. 07/117,772
Integrated circuit signature analyzer for testing digital circuitry
Inventors:
William S. Herz, Robert A. Williams
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Nov 5, 1987
Inventors
William S. Herz
Robert A. Williams
Assignee (at issue)
Ampex 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.