Granted Patent
Utility
US 4,245,215 · App. 06/041,532
Power line signalling system
Inventors:
Lorne O'Connor, Richard Saylor, Stephen H. Buckser
Patented Case
View Patent ↗
Granted: Jan 13, 1981
Filed: May 22, 1979
Inventors
Lorne O'Connor
Richard Saylor
Stephen H. Buckser
Assignee (at issue)
American District Telegraph Company
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.