Granted Patent
Utility
US 4,234,901 · App. 06/018,706
Protective relay apparatus
Inventor:
William A. Strickland
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Mar 8, 1979
Inventor
William A. Strickland
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.