Granted Patent
Utility
US 5,671,272 · App. 08/380,409
Current mode ring trip detector
Inventor:
Gerald M. Cotreau
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Jan 30, 1995
Inventor
Gerald M. Cotreau
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.