Granted Patent
Utility
US 4,943,765 · App. 07/401,375
Circuit for measuring voltages in a three-phase installation, in particular an installation of the metalclad type
Inventors:
Jean-Pierre Dupraz, Jean-Paul Moncorge
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Aug 31, 1989
Inventors
Jean-Pierre Dupraz
Jean-Paul Moncorge
Assignee (at issue)
GEC Alsthom T&D SA
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.