Granted Patent
Utility
US 4,438,475 · App. 06/404,170
Ultra-high speed protective relay apparatus and method for providing single pole switching
Inventor:
Paul H. Haley
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Aug 2, 1982
Inventor
Paul H. Haley
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.