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Takuya Kanai
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Musashino-shi, Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Wavelength-selection type optical receiving apparatus
Patent number
11,921,333
Issue date
Mar 5, 2024
Nippon Telegraph and Telephone Corporation
Takuya Kanai
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical receiving apparatus, optical transmission system, optical t...
Patent number
11,870,497
Issue date
Jan 9, 2024
Nippon Telegraph and Telephone Corporation
Ryo Igarashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system and optical communication method
Patent number
11,863,211
Issue date
Jan 2, 2024
Nippon Telegraph and Telephone Corporation
Ryo Igarashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical space communication system and optical space communication...
Patent number
11,848,701
Issue date
Dec 19, 2023
Nippon Telegraph and Telephone Corporation
Takeshi Imai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiving apparatus, optical transmission system, optical t...
Patent number
11,652,554
Issue date
May 16, 2023
Nippon Telegraph and Telephone Corporation
Ryo Igarashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communication system and optical communication method
Patent number
11,621,778
Issue date
Apr 4, 2023
Nippon Telegraph and Telephone Corporation
Masamichi Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical wavelength selecting filter-module and optical wavelength s...
Patent number
11,506,883
Issue date
Nov 22, 2022
Nippon Telegraph and Telephone Corporation
Takeshi Imai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiving apparatus, optical transmitting apparatus, and fr...
Patent number
11,451,305
Issue date
Sep 20, 2022
Nippon Telegraph and Telephone Corporation
Ryo Igarashi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Tunable optical filter control apparatus and tunable optical filter...
Patent number
11,258,510
Issue date
Feb 22, 2022
Nippon Telegraph and Telephone Corporation
Takeshi Imai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
COHERENT OPTICAL RECEPTION DEVICE AND COHERENT OPTICAL RECEPTION ME...
Publication number
20240031035
Publication date
Jan 25, 2024
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
INSTALLATION METHOD OF OPTICAL COMMUNICATION DEVICE AND OPTICAL COM...
Publication number
20230361876
Publication date
Nov 9, 2023
Nippon Telegraph and Telephone Corporation
Yasunari TANAKA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COHERENT OPTICAL RECEPTION DEVICE AND COHERENT OPTICAL RECEPTION ME...
Publication number
20230344522
Publication date
Oct 26, 2023
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND PROTECTION METHOD FOR OPTICAL COMM...
Publication number
20230308174
Publication date
Sep 28, 2023
Nippon Telegraph and Telephone Corporation
Shin KANEKO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL ACCESS SYSTEM, AND OPTICAL TRANSMISSIO...
Publication number
20230308175
Publication date
Sep 28, 2023
Nippon Telegraph and Telephone Corporation
Masamichi FUJIWARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL FEEDING SYSTEM
Publication number
20230308189
Publication date
Sep 28, 2023
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
BRANCH RATIO SETTING SYSTEM, METHOD FOR PRODUCING OPTICAL COMMUNICA...
Publication number
20230291484
Publication date
Sep 14, 2023
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION ESTIMATION METHOD, OPTICAL AMPLIFICATION ESTI...
Publication number
20230224034
Publication date
Jul 13, 2023
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT LEAKAGE CONFIRMATION METHOD, LIGHT LEAKAGE CONFIRMATION APPAR...
Publication number
20230188208
Publication date
Jun 15, 2023
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION SYSTEM, TRANSMISSION METHOD, AND COMMUNICATION SYSTEM
Publication number
20230170999
Publication date
Jun 1, 2023
Nippon Telegraph and Telephone Corporation
Takuya KANAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL PROCESSING APPARATUS AND OPTICAL SIGNAL PROCESSING M...
Publication number
20230163856
Publication date
May 25, 2023
Nippon Telegraph and Telephone Corporation
Takuya KANAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND OPTICAL COMMUNICATION METHOD
Publication number
20230163852
Publication date
May 25, 2023
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION APPARATUS, OPTICAL COMMUNICATION SYSTEM AND O...
Publication number
20230030158
Publication date
Feb 2, 2023
Nippon Telegraph and Telephone Corporation
Takuya KANAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SPACE COMMUNICATION SYSTEM AND OPTICAL SPACE COMMUNICATION...
Publication number
20220368417
Publication date
Nov 17, 2022
Nippon Telegraph and Telephone Corporation
Takeshi IMAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS, OPTICAL TRANSMISSION SYSTEM, OPTICAL T...
Publication number
20220368427
Publication date
Nov 17, 2022
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS, OPTICAL TRANSMISSION SYSTEM, OPTICAL T...
Publication number
20220368428
Publication date
Nov 17, 2022
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL COMMUNICATION SYSTEM AND OPTICAL COMMUNICATION METHOD
Publication number
20220239375
Publication date
Jul 28, 2022
Nippon Telegraph and Telephone Corporation
Masamichi FUJIWARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH-SELECTION TYPE OPTICAL RECEIVING APPARATUS
Publication number
20220113478
Publication date
Apr 14, 2022
Nippon Telegraph and Telephone Corporation
Takuya KANAI
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL WAVELENGTH SELECTING FILTER-MODULE AND OPTICAL WAVELENGTH S...
Publication number
20220043253
Publication date
Feb 10, 2022
Nippon Telegraph and Telephone Corporation
Takeshi IMAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVING APPARATUS, OPTICAL TRANSMITTING APPARATUS, AND FR...
Publication number
20210399809
Publication date
Dec 23, 2021
Nippon Telegraph and Telephone Corporation
Ryo IGARASHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TUNABLE OPTICAL FILTER CONTROL APPARATUS AND TUNABLE OPTICAL FILTER...
Publication number
20210111791
Publication date
Apr 15, 2021
Nippon Telegraph and Telephone Corporation
Takeshi Imai
H04 - ELECTRIC COMMUNICATION TECHNIQUE