Granted Patent
Utility
US 5,659,570 · App. 08/380,411
Circuit and method for loopback test and on-hook transmission integrated in a telephone subscriber line interface circuit
Inventors:
Gerald M. Cotreau, Christopher Ludeman, Donald K. Whitney
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jan 30, 1995
Inventors
Gerald M. Cotreau
Christopher Ludeman
Donald K. Whitney
Assignee (at issue)
HARRIS 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.