Granted Patent
Utility
US 4,357,598 · App. 06/252,681
Three-phase power distribution network communication system
Inventor:
Waymon A. Melvin, Jr.
Patented Case
View Patent ↗
Granted: Nov 2, 1982
Filed: Apr 9, 1981
Inventor
Waymon A. Melvin, Jr.
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.