Granted Patent
Utility
US 4,658,258 · App. 06/554,086
Taperd horn antenna with annular choke channel
Inventor:
Robert M. Wilson
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Nov 21, 1983
Inventor
Robert M. Wilson
Assignee (at issue)
RCA 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.