Granted Patent
Utility
US 4,872,020 · App. 07/260,560
Slot antenna in circular waveguide
Inventor:
James S. Ajioka
Patented Case
View Patent ↗
Granted: Oct 3, 1989
Filed: Oct 20, 1988
Inventor
James S. Ajioka
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.