Tsutomu Kitoh

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical coupling/splitting device, two-way optical propagation devi...
- Patent number 9,306,670
- Issue date Apr 5, 2016
- Nippon Telegraph and Telephone Corporation
- Masamichi Fujiwara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Arrayed waveguide grating, optical module provided with said arraye...
- Patent number 9,116,305
- Issue date Aug 25, 2015
- Nippon Telegraph and Telephone Corporation
- Hirotaka Nakamura
- G02 - OPTICS
Information Patent Grant
Wideband interferometer type polarization light beam combiner and s...
- Patent number 8,787,710
- Issue date Jul 22, 2014
- Nippon Telegraph and Telephone Corporation
- Takayuki Mizuno
- G02 - OPTICS
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
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
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
Optical wavelength multiplexing/ de-multiplexing circuit
- Patent number 8,369,666
- Issue date Feb 5, 2013
- Nippon Telegraph and Telephone Corporation
- Shin Kamei
- G02 - OPTICS
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
Interferometer optical switch and variable optical attenuator
- Patent number 7,590,312
- Issue date Sep 15, 2009
- Nippon Telegraph and Telephone Corporation
- Takayuki Mizuno
- 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
Information Patent Grant
Arrayed waveguide grating type optical multiplexer/demultiplexer ci...
- Patent number 7,400,800
- Issue date Jul 15, 2008
- NTT Electronics Corporation
- Tsutomu Kitoh
- G02 - OPTICS
Information Patent Grant
Wave transmission medium and waveguide circuit
- Patent number 7,397,977
- Issue date Jul 8, 2008
- Nippon Telegraph and Telephone Corporation
- Toshikazu Hashimoto
- G02 - OPTICS
Information Patent Grant
Optical multi/demultiplexing circuit equipped with phase generating...
- Patent number 7,085,438
- Issue date Aug 1, 2006
- Nippon Telegraph and Telephone Corporation
- Takayuki Mizuno
- G02 - OPTICS
Information Patent Grant
Planar lightwave circuit and optical circuit
- Patent number 6,937,797
- Issue date Aug 30, 2005
- Nippon Telegraph and Telephone Corporation
- Takayuki Mizuno
- G02 - OPTICS
Information Patent Grant
Optical multiplexer and optical demultiplexer
- Patent number 6,735,358
- Issue date May 11, 2004
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical multi/demultiplexer
- Patent number 6,606,433
- Issue date Aug 12, 2003
- Nippon Telegraph and Telephone Corporation
- Manabu Oguma
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
ARRAYED WAVEGUIDE GRATING, OPTICAL MODULE PROVIDED WITH SAID ARRAYE...
- Publication number 20140376861
- Publication date Dec 25, 2014
- Hirotaka Nakamura
- G02 - OPTICS
Information Patent Application
LIGHT MERGING/BRANCHING DEVICE, BIDIRECTIONAL LIGHT PROPAGATION DEV...
- Publication number 20140186040
- Publication date Jul 3, 2014
- Masamichi Fujiwara
- G02 - OPTICS
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
Wideband Interferometer Type Polarized Light Combiner and Splitter
- Publication number 20120063716
- Publication date Mar 15, 2012
- Nippon Telegraph and Telephone Corporation
- Takayuki Mizuno
- G02 - OPTICS
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 Wavelength Multiplexing/ De-multiplexing Circuit
- Publication number 20110116802
- Publication date May 19, 2011
- Nippon Telegraph and Telephone Corporation
- Shin Kamei
- 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
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
Information Patent Application
Array waveguide lattic type optical multilexer/demultiplexer circuit
- Publication number 20060233491
- Publication date Oct 19, 2006
- Tsutomu Kitoh
- G02 - OPTICS
Information Patent Application
Wave transmission medium and waveguide circuit
- Publication number 20060126992
- Publication date Jun 15, 2006
- Toshikazu Hashimoto
- G02 - OPTICS
Information Patent Application
Interference optical switch and variable optical attenuator
- Publication number 20060072866
- Publication date Apr 6, 2006
- Takayuki Mizuno
- G02 - OPTICS
Information Patent Application
Optical multi/demultiplexing circuit equipped with phase generating...
- Publication number 20040136647
- Publication date Jul 15, 2004
- Nippon Telegraph and Telephone Corporation
- Takayuki Mizuno
- G02 - OPTICS
Information Patent Application
Planar lightwave circuit and optical circuit
- Publication number 20020154863
- Publication date Oct 24, 2002
- Takayuki Mizuno
- G02 - OPTICS
Information Patent Application
Optical multiplexer and optical demultiplexer
- Publication number 20020106147
- Publication date Aug 8, 2002
- Nippon Telegraph and Telephone Corporation
- Tsutomu Kitoh
- G02 - OPTICS
Information Patent Application
Optical multi/demultiplexer
- Publication number 20020015554
- Publication date Feb 7, 2002
- Nippon Telegraph and Telephone Corporation
- Manabu Oguma
- G02 - OPTICS

Tsutomu Kitoh

Person

Patents Grantslast 30 patents

Optical coupling/splitting device, two-way optical propagation devi...

Arrayed waveguide grating, optical module provided with said arraye...

Wideband interferometer type polarization light beam combiner and s...

Optical wavelength multi/demultiplexer

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...

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

Optical wavelength multiplexing/ de-multiplexing circuit

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

Interferometer optical switch and variable optical attenuator

Optical functional circuit

Arrayed waveguide grating type optical multiplexer/demultiplexer ci...

Wave transmission medium and waveguide circuit

Optical multi/demultiplexing circuit equipped with phase generating...

Planar lightwave circuit and optical circuit

Optical multiplexer and optical demultiplexer

Optical multi/demultiplexer

Patents Applicationslast 30 patents

ARRAYED WAVEGUIDE GRATING, OPTICAL MODULE PROVIDED WITH SAID ARRAYE...

LIGHT MERGING/BRANCHING DEVICE, BIDIRECTIONAL LIGHT PROPAGATION DEV...

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

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

OPTICAL WAVELENGTH MULTI/DEMULTIPLEXER

Wideband Interferometer Type Polarized Light Combiner and Splitter

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

Optical Wavelength Multiplexing/ De-multiplexing Circuit

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

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

Optical Functional Circuit

Array waveguide lattic type optical multilexer/demultiplexer circuit

Wave transmission medium and waveguide circuit

Interference optical switch and variable optical attenuator

Optical multi/demultiplexing circuit equipped with phase generating...

Planar lightwave circuit and optical circuit

Optical multiplexer and optical demultiplexer

Optical multi/demultiplexer