Hirotaka Kawai

Person

Shizuoka, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Reflection type variable optical attenuator
- Patent number 8,854,716
- Issue date Oct 7, 2014
- FDK Corporation
- Hiroaki Ono
- G02 - OPTICS
Information Patent Grant
Optical attenuator
- Patent number 7,336,418
- Issue date Feb 26, 2008
- FDK Corporation
- Hirotaka Kawai
- 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
Ferrule attachment type optical isolator, and manufacturing method...
- Patent number 6,906,843
- Issue date Jun 14, 2005
- FDK Corporation
- Mitsuru Nagasawa
- 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
Faraday rotation angle varying device
- Patent number 6,417,952
- Issue date Jul 9, 2002
- FDK Corporation
- Hirotaka Kawai
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Faraday rotator
- Patent number 6,288,827
- Issue date Sep 11, 2001
- FDK Corporation
- Hirotaka Kawai
- G02 - OPTICS
Information Patent Grant
Faraday rotation angle varying apparatus
- Patent number 6,108,120
- Issue date Aug 22, 2000
- FDK Corporation
- Hirotaka Kawai
- G02 - OPTICS
Information Patent Grant
Magneto-optical element material and Faraday element using the same
- Patent number 5,965,287
- Issue date Oct 12, 1999
- FDK Corporation
- Toshiyasu Suzuki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Material for magneto-optical element and faraday rotator using the...
- Patent number 5,566,017
- Issue date Oct 15, 1996
- FDK Corporation
- Toshiyasu Suzuki
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magneto-optical element material formed of magnetic garnet single c...
- Patent number 5,547,613
- Issue date Aug 20, 1996
- FDK Corporation
- Hirotaka Kawai
- C30 - CRYSTAL GROWTH

Patents Applicationslast 30 patents

Information Patent Application
REFLECTION TYPE VARIABLE OPTICAL ATTENUATOR
- Publication number 20130120824
- Publication date May 16, 2013
- FDK CORPORATION
- Hiroaki Ono
- 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
FERRULE ATTACHMENT TYPE OPTICAL ISOLATOR, AND MANUFACTURING METHOD...
- Publication number 20050094239
- Publication date May 5, 2005
- FDK CORPORATION
- Mitsuru Nagasawa
- 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

Hirotaka Kawai

Person

Patents Grantslast 30 patents

Reflection type variable optical attenuator

Optical attenuator

Faraday rotation device and optical device using same

Ferrule attachment type optical isolator, and manufacturing method...

Farady rotation device and optical device comprising it

Faraday rotation angle varying device

Faraday rotator

Faraday rotation angle varying apparatus

Magneto-optical element material and Faraday element using the same

Material for magneto-optical element and faraday rotator using the...

Magneto-optical element material formed of magnetic garnet single c...

Patents Applicationslast 30 patents

REFLECTION TYPE VARIABLE OPTICAL ATTENUATOR

Faraday rotation device and optical device using same

FERRULE ATTACHMENT TYPE OPTICAL ISOLATOR, AND MANUFACTURING METHOD...

Farady rotation device and optical device comprising it