Granted Patent
Utility
US 4,935,692 · App. 07/278,134
Vector ammeter having digital signal processing unit
Inventor:
Tomio Wakasugi
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Nov 30, 1988
Inventor
Tomio Wakasugi
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.