Granted Patent
Utility
US 6,512,414 · App. 09/901,603
Automatic filter tuning control system
Inventors:
Akio Yokoyama, Hisashi Takahashi, Michiyo Yamamoto, Norihide Kinugasa, Mamoru Arayashiki
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Jul 11, 2001
Inventors
Akio Yokoyama
Hisashi Takahashi
Michiyo Yamamoto
Norihide Kinugasa
Mamoru Arayashiki
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.