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Kohei SAITO
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Tokyo-to, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Wavelength cross connect device and wavelength cross connect method
Patent number
11,979,226
Issue date
May 7, 2024
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and filter penalty reduction method
Patent number
11,942,755
Issue date
Mar 26, 2024
Nippon Telegraph and Telephone Corporation
Kohei Saito
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Cyclic wavelength band replacement device, multi-band transmission...
Patent number
11,824,583
Issue date
Nov 21, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
OSNR spectrum estimation apparatus, OSNR spectrum estimation method...
Patent number
11,424,824
Issue date
Aug 23, 2022
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical amplifier, optical transmission system, and optical cable f...
Patent number
11,329,445
Issue date
May 10, 2022
Nippon Telegraph and Telephone Corporation
Takashi Kotanigawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Dispersion compensation designing device, dispension compensation m...
Patent number
11,206,084
Issue date
Dec 21, 2021
Nippon Telegraph and Telephone Corporation
Minoru Yamaguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system
Patent number
9,692,543
Issue date
Jun 27, 2017
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
COMPONENT EVALUATION DEVICE AND COMPONENT EVALUATION METHOD
Publication number
20240410792
Publication date
Dec 12, 2024
Honda Motor Co., Ltd.
Takayuki Ishibashi
G01 - MEASURING TESTING
Information
Patent Application
REPAIR SEARCH SYSTEM
Publication number
20240330352
Publication date
Oct 3, 2024
Honda Motor Co., Ltd.
Takayuki Ishibashi
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
WAVELENGTH CROSS CONNECT DEVICE AND WAVELENGTH CROSS CONNECT METHOD
Publication number
20230275667
Publication date
Aug 31, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH CROSS CONNECT DEVICE, MULTIBAND TRANSMISSION SYSTEM, AND...
Publication number
20230275668
Publication date
Aug 31, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND DESIGN METHOD FOR OPTICALTRANSMISSI...
Publication number
20230268998
Publication date
Aug 24, 2023
Nippon Telegraph and Telephone Corporation
Kohei SAITO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL NODE DEVICE, OPTICAL TRANSPORT NETWORK SYSTEM, OPTICAL PATH...
Publication number
20230254611
Publication date
Aug 10, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
MULTI-CORE FIBER, OPTICAL TRANSMISSION SYSTEM, AND OPTICAL TRANSMIS...
Publication number
20230244025
Publication date
Aug 3, 2023
Nippon Telegraph and Telephone Corporation
Kenta HIROSE
G02 - OPTICS
Information
Patent Application
CYCLIC WAVELENGTH BAND REPLACEMENT DEVICE, MULTI-BAND TRANSMISSION...
Publication number
20230074213
Publication date
Mar 9, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH CROSS CONNECT DEVICE AND WAVELENGTH CROSS CONNECT METHOD
Publication number
20230067932
Publication date
Mar 2, 2023
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER, RECEIVER, OPTICAL TRANSMISSION SYSTEM, AND OPTIC...
Publication number
20220416897
Publication date
Dec 29, 2022
Nippon Telegraph and Telephone Corporation
Kohei Saito
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OSNR SPECTRUM ESTIMATION APPARATUS, OSNR SPECTRUM ESTIMATION METHOD...
Publication number
20210351842
Publication date
Nov 11, 2021
Nippon Telegraph and Telephone Corporation
Hiroki KAWAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFIER, OPTICAL TRANSMISSION SYSTEM, AND OPTICAL CABLE F...
Publication number
20210257803
Publication date
Aug 19, 2021
Nippon Telegraph and Telephone Corporation
Takashi Kotanigawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND FILTER PENALTY REDUCTION METHOD
Publication number
20210234617
Publication date
Jul 29, 2021
Nippon Telegraph and Telephone Corporation
Kohei Saito
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DISPERSION COMPENSATION DESIGNING DEVICE, DISPENSION COMPENSATION M...
Publication number
20210159982
Publication date
May 27, 2021
Nippon Telegraph and Telephone Corporation
Minoru Yamaguchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM
Publication number
20160241352
Publication date
Aug 18, 2016
Nippon Telegraph and Telephone Corporation
Toshiya MATSUDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE