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Katsuhiro Araya
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Yokohama-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Transmission side transmission device and redundancy method of tran...
Patent number
12,326,785
Issue date
Jun 10, 2025
Nippon Telegraph and Telephone Corporation
Katsuhiro Araya
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Transmitting side transmission device, receiving side transmission...
Patent number
12,038,813
Issue date
Jul 16, 2024
Nippon Telegraph and Telephone Corporation
Katsuhiro Araya
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Optical cross-connect device, optical transmission system, and opti...
Patent number
11,812,205
Issue date
Nov 7, 2023
Nippon Telegraph and Telephone Corporation
Masatoshi Namiki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmitting device, receiving device, packet transfer system,packe...
Patent number
11,750,535
Issue date
Sep 5, 2023
Nippon Telegraph and Telephone Corporation
Hiroto Takechi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
11,696,056
Issue date
Jul 4, 2023
Nippon Telegraph and Telephone Corporation
Hiroto Takechi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Network device and network test method
Patent number
11,588,720
Issue date
Feb 21, 2023
Nippon Telegraph and Telephone Corporation
Masaki Shinkai
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wiring management system and wiring management method
Patent number
11,362,894
Issue date
Jun 14, 2022
Nippon Telegraph and Telephone Corporation
Yoshihiko Uematsu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical transmission method
Patent number
11,265,628
Issue date
Mar 1, 2022
Nippon Telegraph and Telephone Corporation
Katsuhiro Araya
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical reception device
Patent number
11,251,877
Issue date
Feb 15, 2022
Nippon Telegraph and Telephone Corporation
Hiroki Kawahara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength optical modulation circuit and wavelength-division...
Patent number
7,127,168
Issue date
Oct 24, 2006
Nippon Telegraph and Telephone Corporation
Jun-ichi Kani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength generating method and apparatus based on flattenin...
Patent number
7,068,412
Issue date
Jun 27, 2006
Nippon Telegraph & Telephone Corp.
Masamichi Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength generating method and apparatus based on flattenin...
Patent number
6,924,924
Issue date
Aug 2, 2005
Nippon Telegraph and Telephone Corporation
Masamichi Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multi-wavelength generating method and apparatus based on flattenin...
Patent number
6,831,774
Issue date
Dec 14, 2004
Nippon Telegraph and Telephone Corporation
Masamichi Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
TRANSMISSION SIDE TRANSMISSION DEVICE AND REDUNDANCY METHOD OF TRAN...
Publication number
20240330112
Publication date
Oct 3, 2024
Nippon Telegraph and Telephone Corporation
Katsuhiro ARAYA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TRANSMITTING SIDE TRANSMISSION DEVICE, RECEIVING SIDE TRANSMISSION...
Publication number
20230297476
Publication date
Sep 21, 2023
Nippon Telegraph and Telephone Corporation
Katsuhiro Araya
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
COMMUNICATION SYSTEM, NETWORK RELAY DEVICE, NETWORK RELAY METHOD, A...
Publication number
20230103537
Publication date
Apr 6, 2023
Nippon Telegraph and Telephone Corporation
Hideki MAEDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMPONENT INFORMATION MANAGEMENT DEVICE, COMPONENT INFORMATION MANA...
Publication number
20220358526
Publication date
Nov 10, 2022
Nippon Telegraph and Telephone Corporation
Masahiro YOKOTA
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
TRANSMITTING DEVICE, RECEIVING DEVICE, PACKET TRANSFER SYSTEM,PACKE...
Publication number
20220353206
Publication date
Nov 3, 2022
Nippon Telegraph and Telephone Corporation
Hiroto TAKECHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL CROSS-CONNECT DEVICE, OPTICAL TRANSMISSION SYSTEM, AND OPTI...
Publication number
20220286762
Publication date
Sep 8, 2022
Nippon Telegraph and Telephone Corporation
Masatoshi Namiki
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
Publication number
20220046341
Publication date
Feb 10, 2022
Nippon Telegraph and Telephone Corporation
Hiroto TAKECHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND OPTICAL TRANSMISSION METHOD
Publication number
20210321178
Publication date
Oct 14, 2021
Nippon Telegraph and Telephone Corporation
Katsuhiro ARAYA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEPTION DEVICE
Publication number
20210218474
Publication date
Jul 15, 2021
Nippon Telegraph and Telephone Corporation
Hiroki KAWAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL CROSS-CONNECT DEVICE
Publication number
20210219031
Publication date
Jul 15, 2021
Nippon Telegraph and Telephone Corporation
Hiroki KAWAHARA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
NETWORK DEVICE AND NETWORK TEST METHOD
Publication number
20210211370
Publication date
Jul 8, 2021
Nippon Telegraph and Telephone Corporation
Masaki SHINKAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WIRING MANAGEMENT SYSTEM AND WIRING MANAGEMENT METHOD
Publication number
20210014585
Publication date
Jan 14, 2021
Nippon Telegraph and Telephone Corporation
Yoshihiko Uematsu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-wavelength generating method and apparatus based on flattenin...
Publication number
20050008373
Publication date
Jan 13, 2005
Nippon Telegraph and Telephone Corp.
Masamichi Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-wavelength generating method and apparatus based on flattenin...
Publication number
20040100682
Publication date
May 27, 2004
Nippon Telegraph and Telephone Corp.
Masamichi Fujiwara
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-wavelength optical modulation circuit and wavelength-division...
Publication number
20020191904
Publication date
Dec 19, 2002
Nippon Telegraph and Telephone Corporation
Jun-Ichi Kani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multi-wavelength generating method and apparatus based on flattenin...
Publication number
20020015212
Publication date
Feb 7, 2002
Masamichi Fujiwara
G02 - OPTICS