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Koki SHIBAHARA
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Kanagawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Light amplifying relay system
Patent number
12,034,269
Issue date
Jul 9, 2024
Nippon Telegraph and Telephone Corporation
Takayuki Mizuno
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical transmission system, optical transmission apparatus and opt...
Patent number
11,888,584
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
11,888,522
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multimode optical amplifier
Patent number
11,888,281
Issue date
Jan 30, 2024
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical signal processing apparatus, optical signal processing meth...
Patent number
11,770,205
Issue date
Sep 26, 2023
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical repeater
Patent number
11,438,071
Issue date
Sep 6, 2022
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Crosstalk estimation system
Patent number
11,349,564
Issue date
May 31, 2022
Nippon Telegraph and Telephone Corporation
Akira Isoda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
11,101,914
Issue date
Aug 24, 2021
Nippon Telegraph and Telephone Corporation
Koki Shibahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Chromatic dispersion estimating circuit, optical reception device a...
Patent number
10,422,719
Issue date
Sep 24, 2019
NTT Electronics Corporation
Etsushi Yamazaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
SIGNAL DETECTION DEVICE, SIGNAL DETECTION METHOD, AND PROGRAM
Publication number
20240388376
Publication date
Nov 21, 2024
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL DETECTOR, CARRIER PHASE RETRIEVAL APPARATUS, CARRIER PHASE R...
Publication number
20230421267
Publication date
Dec 28, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SIGNAL DETECTION APPARATUS, SIGNAL DETECTION METHOD AND PROGRAM
Publication number
20230216589
Publication date
Jul 6, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
Publication number
20230057448
Publication date
Feb 23, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS AND OPT...
Publication number
20230054203
Publication date
Feb 23, 2023
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL SIGNAL PROCESSING APPARATUS, OPTICAL SIGNAL PROCESSING METH...
Publication number
20220329343
Publication date
Oct 13, 2022
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Mode Equalization Filter
Publication number
20220317349
Publication date
Oct 6, 2022
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
G02 - OPTICS
Information
Patent Application
Optical Repeater
Publication number
20220045759
Publication date
Feb 10, 2022
Hirotaka Ono
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CROSSTALK ESTIMATION SYSTEM
Publication number
20210376924
Publication date
Dec 2, 2021
Nippon Telegraph and Telephone Corporation
Akira ISODA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
LIGHT AMPLIFYING RELAY SYSTEM
Publication number
20210296847
Publication date
Sep 23, 2021
Nippon Telegraph and Telephone Corporation
Takayuki MIZUNO
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Mode Equalization Filter
Publication number
20210263214
Publication date
Aug 26, 2021
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
G02 - OPTICS
Information
Patent Application
Multimode Optical Amplifier
Publication number
20210257802
Publication date
Aug 19, 2021
Nippon Telegraph and Telephone Corporation
Hirotaka Ono
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
Publication number
20210013985
Publication date
Jan 14, 2021
Nippon Telegraph and Telephone Corporation
Koki SHIBAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
CHROMATIC DISPERSION ESTIMATING CIRCUIT, OPTICAL RECEPTION DEVICE A...
Publication number
20180252614
Publication date
Sep 6, 2018
NTT ELECTRONICS CORPORATION
Etsushi YAMAZAKI
H04 - ELECTRIC COMMUNICATION TECHNIQUE