Granted Patent
Utility
US 4,783,639 · App. 06/800,241
Wideband microwave diplexer including band pass and band stop resonators
Inventors:
Thomas Hudspeth, Fritz Steinberg
Patented Case
View Patent ↗
Granted: Nov 8, 1988
Filed: Nov 21, 1985
Inventors
Thomas Hudspeth
Fritz Steinberg
Assignee (at issue)
Hughes Aircraft Company
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.