Granted Patent
Utility
US 4,282,576 · App. 06/119,686
Indicator diagram based AC electric energy meter
Inventors:
Robert T. Elms, Leonard C. Vercellotti
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Feb 8, 1980
Inventors
Robert T. Elms
Leonard C. Vercellotti
Assignee (at issue)
Westinghouse Electric Company LLC
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.