Granted Patent
Utility
US 5,321,849 · App. 07/704,114
System for controlling signal level at both ends of a transmission link based on a detected valve
Inventor:
Paul Lemson
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: May 22, 1991
Inventor
Paul Lemson
Assignee (at issue)
Southwestern Bell Technology Resources, 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.