Granted Patent
Utility
US 6,121,939 · App. 08/961,767
Multibeam antenna
Inventors:
Hiroaki Imaizumi, Koji Sakauchi, Shuji Hagiwara, Hirofumi Higuchi, Ryotaro Manabe
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: Oct 31, 1997
Inventors
Hiroaki Imaizumi
Koji Sakauchi
Shuji Hagiwara
Hirofumi Higuchi
Ryotaro Manabe
Assignee (at issue)
Yagi Antenna Inc.
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.