Granted Patent
Utility
US 4,340,965 · App. 06/199,176
Method of and apparatus for detecting and circumventing malfunctions in a current-loop communications system
Inventors:
John T. Beckman, Paul S. Sanik
Patented Case
View Patent ↗
Granted: Jul 20, 1982
Filed: Oct 22, 1980
Inventors
John T. Beckman
Paul S. Sanik
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.