Granted Patent
Utility
US 5,712,910 · App. 08/686,729
Ring trip circuit having a simple trip detecting circuit of a high response speed
Inventor:
Masashi Saito
Patented Case
View Patent ↗
Granted: Jan 27, 1998
Filed: Jul 26, 1996
Inventor
Masashi Saito
Assignee (at issue)
NEC 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.