Granted Patent
Utility
US 4,460,877 · App. 06/443,419
Broad-band printed-circuit balun employing coupled-strip all pass filters
Inventor:
William G. Sterns
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Nov 22, 1982
Inventor
William G. Sterns
Assignee (at issue)
International Telephone and Telegraph 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.