Granted Patent
Utility
US 4,901,008 · App. 07/252,246
Circuit arrangement for testing the correct functioning of circuit(s)
Inventors:
David A. Quastel, Nigel K. Hill
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Sep 29, 1988
Inventors
David A. Quastel
Nigel K. Hill
Assignee (at issue)
Westinghouse Brake and Signal Holdings Limited
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.