Granted Patent
Utility
US 4,939,617 · App. 07/349,330
Method and apparatus for monitoring an AC transmission line
Inventors:
Gary R. Hoffman, Walter L. Hinman, Jr.
Patented Case
View Patent ↗
Granted: Jul 3, 1990
Filed: May 5, 1989
Inventors
Gary R. Hoffman
Walter L. Hinman, Jr.
Assignee (at issue)
Dowty RFL Industries, 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.