Granted Patent
Utility
US 6,137,189 · App. 09/365,238
Line circuit apparatus for supplying power to a telephone set in telecommunication systems
Inventor:
Douglas Youngblood
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Jul 30, 1999
Inventor
Douglas Youngblood
Assignee (at issue)
Intersil 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.