Granted Patent
Utility
US 5,398,234 · App. 08/130,331
DS-0 loop-back detection on a DS-1 line
Inventors:
Anne O'Connell, John Hickey, John Byrne
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Oct 1, 1993
Inventors
Anne O'Connell
John Hickey
John Byrne
Assignee (at issue)
Digital Equipment Corporation
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.