Granted Patent
Utility
US 6,833,821 · App. 10/388,595
3-dimensional wave-guiding structure for horn or tube-type waveguides
Inventors:
Osamu Amano, Akihito Watanabe
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Mar 17, 2003
Inventors
Osamu Amano
Akihito Watanabe
Assignees (at issue)
SAKASE ADTECH CO., LTD.
NEC TOSHIBA SPACE SYSTEMS, LTD.
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.