Granted Patent
Utility
US 4,818,964 · App. 06/856,089
Switchable multi-power-level short slot waveguide hybrid coupler
Inventor:
Mon N. Wong
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Apr 28, 1986
Inventor
Mon N. Wong
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.