Granted Patent
Utility
US 4,851,635 · App. 07/219,612
Method and apparatus for determining the power factor of a circuit
Inventor:
John F. Farrow
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Jul 14, 1988
Inventor
John F. Farrow
Assignee (at issue)
Medar, Inc.
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.