Hirotoshi Nagata

Person

Chiyoda-ku, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical waveguide device
- Patent number 6,980,705
- Issue date Dec 27, 2005
- Sumitomo Osaka Cement Co., Ltd.
- Yasuyuki Miyama
- G02 - OPTICS
Information Patent Grant
Optical waveguide type optical modulator and production method ther...
- Patent number 6,956,980
- Issue date Oct 18, 2005
- Sumitomo Osaka Cement Co., Ltd.
- Hirotoshi Nagata
- G02 - OPTICS
Information Patent Grant
Optical waveguide device and method for forming optical waveguide d...
- Patent number 6,806,113
- Issue date Oct 19, 2004
- Sumitomo Osaka Cement Co., Ltd.
- Yasuyuki Miyama
- G02 - OPTICS
Information Patent Grant
Electro-optical element having protective film on top and side surf...
- Patent number 6,583,480
- Issue date Jun 24, 2003
- Sumitomo Osaka Cement Co., Ltd.
- Hirotoshi Nagata
- G02 - OPTICS
Information Patent Grant
Light limiter
- Patent number 6,539,153
- Issue date Mar 25, 2003
- NEC Corporation
- Yasuhisa Taneda
- G02 - OPTICS
Information Patent Grant
Light limiter
- Patent number 6,233,385
- Issue date May 15, 2001
- NEC Corporation
- Yasuhisa Taneda
- G02 - OPTICS
Information Patent Grant
Optical fuse
- Patent number 6,218,658
- Issue date Apr 17, 2001
- NEC Corporation
- Yasuhisa Taneda
- G02 - OPTICS
Information Patent Grant
Light intensity attenuator and attenuating method
- Patent number 6,134,372
- Issue date Oct 17, 2000
- Sumitomo Osaka Cement Co., Ltd.
- Junichiro Ichikawa
- G02 - OPTICS
Information Patent Grant
Package structure for optical element and fibers and composite stru...
- Patent number 5,727,105
- Issue date Mar 10, 1998
- Sumitomo Osaka Cement Co., Ltd.
- Hirotoshi Nagata
- G02 - OPTICS
Information Patent Grant
Package structure for optical element and fibers and composite stru...
- Patent number 5,613,026
- Issue date Mar 18, 1997
- Sumitomo Osaka Cement Co., Ltd.
- Hirotoshi Nagata
- G02 - OPTICS
Information Patent Grant
Optical waveguide modulator having a reduced D.C. drift
- Patent number 5,526,448
- Issue date Jun 11, 1996
- Sumitomo Cement Company, Ltd.
- Hirotoshi Nagata
- G02 - OPTICS
Information Patent Grant
Cutting method and apparatus for removing a secondary coating layer...
- Patent number 5,359,690
- Issue date Oct 25, 1994
- Sumitomo Cement Co., Ltd.
- Ryosuke Kaizu
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Optical waveguide device
- Publication number 20040067021
- Publication date Apr 8, 2004
- Yasuyuki Miyama
- G02 - OPTICS
Information Patent Application
Optical waveguide type optical modulator and production method ther...
- Publication number 20040033001
- Publication date Feb 19, 2004
- Hirotoshi Nagata
- G02 - OPTICS
Information Patent Application
Optical waveguide device and method for forming optical waveguide d...
- Publication number 20020136478
- Publication date Sep 26, 2002
- Miyama Yasuyuki
- G02 - OPTICS
Information Patent Application
Light limiter
- Publication number 20010012431
- Publication date Aug 9, 2001
- NEC Corporation
- Yasuhisa Taneda
- G02 - OPTICS

Hirotoshi Nagata

Person

Patents Grantslast 30 patents

Optical waveguide device

Optical waveguide type optical modulator and production method ther...

Optical waveguide device and method for forming optical waveguide d...

Electro-optical element having protective film on top and side surf...

Light limiter

Light limiter

Optical fuse

Light intensity attenuator and attenuating method

Package structure for optical element and fibers and composite stru...

Package structure for optical element and fibers and composite stru...

Optical waveguide modulator having a reduced D.C. drift

Cutting method and apparatus for removing a secondary coating layer...

Patents Applicationslast 30 patents

Optical waveguide device

Optical waveguide type optical modulator and production method ther...

Optical waveguide device and method for forming optical waveguide d...

Light limiter