Granted Patent
Utility
US 4,956,622 · App. 07/276,844
Waveguide H-plane junctions
Inventor:
Frans C. de Ronde
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Nov 28, 1988
Inventor
Frans C. de Ronde
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.