Granted Patent
Utility
US 4,958,255 · App. 07/291,489
Electrostatic discharge and electromagnetic interference protection circuit
Inventor:
Thomas B. Pritchard
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Dec 28, 1988
Inventor
Thomas B. Pritchard
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.