Granted Patent
Utility
US 4,253,073 · App. 05/934,460
Single ground plane interdigital band-pass filter apparatus and method
Inventor:
Ronald E. Stegens
Patented Case
View Patent ↗
Granted: Feb 24, 1981
Filed: Aug 17, 1978
Inventor
Ronald E. Stegens
Assignee (at issue)
Communications Satellite 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.