Kuninori Hattori

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Kanagawa-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical 90-degree hybrid circuit
- Patent number 8,971,677
- Issue date Mar 3, 2015
- Nippon Telegraph and Telephone Corporation
- Yohei Sakamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical 90-degree hybrid circuit
- Patent number 8,649,640
- Issue date Feb 11, 2014
- Nippon Telegraph and Telephone Corporation
- Yohei Sakamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical 90-degree hybrid circuit
- Patent number 8,588,560
- Issue date Nov 19, 2013
- Nippon Telegraph and Telephone Corporation
- Yohei Sakamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Waveguide-type optical interferometer
- Patent number 8,150,219
- Issue date Apr 3, 2012
- Nippon Telegraph and Telephone Corporation
- Yusuke Nasu
- G02 - OPTICS
Information Patent Grant
Optical delay line interferometer
- Patent number 7,899,279
- Issue date Mar 1, 2011
- Nippon Telegraph and Telephone Corporation
- Yusuke Nasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical waveguide circuit, its manufacturing method and optical wav...
- Patent number 6,304,687
- Issue date Oct 16, 2001
- Nippon Telegraph and Telephone Corporation
- Yasuyuki Inoue
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL 90-DEGREE HYBRID CIRCUIT
- Publication number 20120141067
- Publication date Jun 7, 2012
- Nippon Telegraph and Telephone Corporation
- Yohei Sakamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL 90-DEGREE HYBRID CIRCUIT
- Publication number 20120093457
- Publication date Apr 19, 2012
- Nippon Telegraph and Telephone Corporation
- Yohei Sakamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL 90-DEGREE HYBRID CIRCUIT
- Publication number 20120082414
- Publication date Apr 5, 2012
- Nippon Telegraph and Telephone Corporation
- Yohei Sakamaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL DELAY LINE INTERFEROMETER
- Publication number 20100119189
- Publication date May 13, 2010
- Nippon Telegraph and Telephone Corporation
- Yusuke Nasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
WAVEGUIDE-TYPE OPTICAL INTERFEROMETER
- Publication number 20100104237
- Publication date Apr 29, 2010
- Nippon Telegraph and Telephone Corporation
- Yusuke Nasu
- G02 - OPTICS