Granted Patent
Utility
US 5,488,657 · App. 08/062,614
Apparatus for and method of operating an automatic log on/log off circuit in a telephone system by disconnecting a headset
Inventors:
Dwight D. Lynn, Kirk A. Reid, Shu-Ren Chen
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: May 11, 1993
Inventors
Dwight D. Lynn
Kirk A. Reid
Shu-Ren Chen
Assignee (at issue)
ACS Communications, Inc.
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.