Granted Patent
Utility
US 6,694,014 · App. 09/363,775
Constant impedance digital line interface circuit
Inventor:
Dieter J. H. Knollman
Patented Case
View Patent ↗
Granted: Feb 17, 2004
Filed: Jul 29, 1999
Inventor
Dieter J. H. Knollman
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.