Toshihiro Sakamoto

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Funabashi-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical modulator
- Patent number 7,292,739
- Issue date Nov 6, 2007
- Sumitomo Osaka Cement Co., Ltd.
- Takashi Shinriki
- G02 - OPTICS
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 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
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

Patents Applicationslast 30 patents

Information Patent Application
Optical modulator
- Publication number 20060147145
- Publication date Jul 6, 2006
- Sumitomo Osaka Cement Co., Ltd.
- Takashi Shinriki
- G02 - OPTICS
Information Patent Application
Optical waveguide device
- Publication number 20040067021
- Publication date Apr 8, 2004
- Yasuyuki Miyama
- 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