Granted Patent
Utility
US 4,257,004 · App. 05/972,164
Electrical energy measuring multimeter
Inventor:
Robert C. Miller
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Dec 21, 1978
Inventor
Robert C. Miller
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.