Granted Patent
Utility
US 4,835,651 · App. 07/177,666
Loss-of-potential supervision for a distance relay
Inventors:
Hung J. Li, James P. Garrity
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Apr 5, 1988
Inventors
Hung J. Li
James P. Garrity
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.