Granted Patent
Utility
US 5,038,372 · App. 07/402,727
Systems for transmitting data via telephone lines
Inventors:
Robert T. Elms, Robert G. Colclaser, III
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Sep 5, 1989
Inventors
Robert T. Elms
Robert G. Colclaser, III
Assignee (at issue)
ABB Power T&D Company 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.