Yohei Sakamaki

Person

Kanagawa, JP

People

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 wavelength multi/demultiplexer
- Patent number 8,737,779
- Issue date May 27, 2014
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS
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
Planar lightwave circuit, design method for wave propagation circui...
- Patent number 8,554,040
- Issue date Oct 8, 2013
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
Information Patent Grant
Planar lightwave circuit, design method for wave propagation circui...
- Patent number 8,538,222
- Issue date Sep 17, 2013
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
Information Patent Grant
Optical wavelength multiplexing/demultiplexing circuit, optical mod...
- Patent number 8,483,525
- Issue date Jul 9, 2013
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS
Information Patent Grant
Optical modulator
- Patent number 8,467,635
- Issue date Jun 18, 2013
- Nippon Telegraph and Telephone Corporation
- Yoshiyuki Doi
- G02 - OPTICS
Information Patent Grant
Planar lightwave circuit, design method for wave propagation circui...
- Patent number 8,463,097
- Issue date Jun 11, 2013
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
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
Planar lightwave circuit, design method for wave propagation circui...
- Patent number 7,856,163
- Issue date Dec 21, 2010
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
Information Patent Grant
Optical functional circuit
- Patent number 7,580,597
- Issue date Aug 25, 2009
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Planar Lightwave Circuit, Design Method for Wave Propagation Circui...
- Publication number 20120311516
- Publication date Dec 6, 2012
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
Information Patent Application
Planar Lightwave Circuit, Design Method for Wave Propagation Circui...
- Publication number 20120304143
- Publication date Nov 29, 2012
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
Information Patent Application
OPTICAL WAVELENGTH MULTI/DEMULTIPLEXER
- Publication number 20120170891
- Publication date Jul 5, 2012
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS
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 Wavelength Multiplexing/Demultiplexing Circuit, Optical Mod...
- Publication number 20110268447
- Publication date Nov 3, 2011
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS
Information Patent Application
OPTICAL MODULATOR
- Publication number 20110229070
- Publication date Sep 22, 2011
- Nippon Telegraph and Telephone Corporation
- Yoshiyuki Doi
- G02 - OPTICS
Information Patent Application
Planer Lightwave Circuit, Design Method for Wave Propagation Circui...
- Publication number 20100274541
- Publication date Oct 28, 2010
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
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
Information Patent Application
Planar Lightwave Circuit, Design Method for Wave Propagation Circui...
- Publication number 20080273829
- Publication date Nov 6, 2008
- Nippon Telegraph and Telephone Corporation
- Takashi Saida
- G02 - OPTICS
Information Patent Application
Optical Functional Circuit
- Publication number 20080232736
- Publication date Sep 25, 2008
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS

Yohei Sakamaki

Person

Patents Grantslast 30 patents

Optical 90-degree hybrid circuit

Optical wavelength multi/demultiplexer

Optical 90-degree hybrid circuit

Optical 90-degree hybrid circuit

Planar lightwave circuit, design method for wave propagation circui...

Planar lightwave circuit, design method for wave propagation circui...

Optical wavelength multiplexing/demultiplexing circuit, optical mod...

Optical modulator

Planar lightwave circuit, design method for wave propagation circui...

Waveguide-type optical interferometer

Optical delay line interferometer

Planar lightwave circuit, design method for wave propagation circui...

Optical functional circuit

Patents Applicationslast 30 patents

Planar Lightwave Circuit, Design Method for Wave Propagation Circui...

Planar Lightwave Circuit, Design Method for Wave Propagation Circui...

OPTICAL WAVELENGTH MULTI/DEMULTIPLEXER

OPTICAL 90-DEGREE HYBRID CIRCUIT

OPTICAL 90-DEGREE HYBRID CIRCUIT

OPTICAL 90-DEGREE HYBRID CIRCUIT

Optical Wavelength Multiplexing/Demultiplexing Circuit, Optical Mod...

OPTICAL MODULATOR

Planer Lightwave Circuit, Design Method for Wave Propagation Circui...

OPTICAL DELAY LINE INTERFEROMETER

WAVEGUIDE-TYPE OPTICAL INTERFEROMETER

Planar Lightwave Circuit, Design Method for Wave Propagation Circui...

Optical Functional Circuit