Granted Patent
Utility
US 4,293,886 · App. 06/104,647
Network protector relay
Inventors:
Larry L. Church, David R. Smith, Shan C. Sun
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Dec 17, 1979
Inventors
Larry L. Church
David R. Smith
Shan C. Sun
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.