Granted Patent
Utility
US 6,144,721 · App. 08/778,816
Apparatus and method for line pair testing and fault diagnostics
Inventor:
Charles D. Stephens
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jan 3, 1997
Inventor
Charles D. Stephens
Assignee (at issue)
Communications Technology 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.