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Tsugio Tokumasu
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Shizuoka, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Magneto-optical device
Patent number
7,280,264
Issue date
Oct 9, 2007
FDK Corporation
Yuji Goto
G02 - OPTICS
Information
Patent Grant
Variable optical filter
Patent number
7,050,216
Issue date
May 23, 2006
Fujitsu Limited
Nobuhiro Fukushima
G02 - OPTICS
Information
Patent Grant
Optical circulator and optical switch
Patent number
7,050,232
Issue date
May 23, 2006
FDK Corporation
Shusuke Wada
G02 - OPTICS
Information
Patent Grant
Faraday rotation device and optical device using same
Patent number
7,006,273
Issue date
Feb 28, 2006
FDK Corporation
Teruhisa Sahashi
G02 - OPTICS
Information
Patent Grant
Farady rotation device and optical device comprising it
Patent number
6,876,480
Issue date
Apr 5, 2005
FDK Corporation
Teruhisa Sahashi
G02 - OPTICS
Information
Patent Grant
Polarization plane switch and optical switching device using the same
Patent number
5,521,741
Issue date
May 28, 1996
FDK Corporation
Hiromitsu Umezawa
G02 - OPTICS
Information
Patent Grant
Optical isolator
Patent number
5,105,307
Issue date
Apr 14, 1992
Fuji Electrochemical Co., Ltd.
Yuko Nishiyama
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Magneto-optical device
Publication number
20070002425
Publication date
Jan 4, 2007
Yuji Goto
G02 - OPTICS
Information
Patent Application
Faraday rotation device and optical device using same
Publication number
20050141075
Publication date
Jun 30, 2005
Teruhisa Sahashi
G02 - OPTICS
Information
Patent Application
Variable optical filter
Publication number
20050134954
Publication date
Jun 23, 2005
FIJITSU LIMITED
Nobuhiro Fukushima
G02 - OPTICS
Information
Patent Application
Farady rotation device and optical device comprising it
Publication number
20040027637
Publication date
Feb 12, 2004
Teruhisa Sahashi
G02 - OPTICS
Information
Patent Application
Optical circulator and optical switch
Publication number
20040012854
Publication date
Jan 22, 2004
Shusuke Wada
G02 - OPTICS