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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Burst optical relaying device and burst optical relaying method
Patent number
12,191,904
Issue date
Jan 7, 2025
Nippon Telegraph and Telephone Corporation
Kana Masumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Server, optical transmission method, optical transmission system, a...
Patent number
11,870,498
Issue date
Jan 9, 2024
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical branch insertion device and optical transmission system usi...
Patent number
11,757,554
Issue date
Sep 12, 2023
Nippon Telegraph and Telephone Corporation
Masahiro Nakagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical branch insertion device and optical transmission system usi...
Patent number
11,742,976
Issue date
Aug 29, 2023
Nippon Telegraph and Telephone Corporation
Masahiro Nakagawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical receiver
Patent number
11,689,294
Issue date
Jun 27, 2023
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical demultiplexer, optical separation device, optical transmiss...
Patent number
11,652,563
Issue date
May 16, 2023
Nippon Telegraph and Telephone Corporation
Kana Masumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and unused channel verification method
Patent number
11,595,120
Issue date
Feb 28, 2023
Nippon Telegraph and Telephone Corporation
Kana Masumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and unused channel verification method
Patent number
11,451,293
Issue date
Sep 20, 2022
Nippon Telegraph and Telephone Corporation
Kana Masumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Dispersion compensation system and dispersion compensation method
Patent number
11,251,868
Issue date
Feb 15, 2022
Nippon Telegraph and Telephone Corporation
Kana Masumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transceiver
Patent number
11,206,086
Issue date
Dec 21, 2021
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitter, optical receiver, and optical transmission system
Patent number
10,951,344
Issue date
Mar 16, 2021
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMISSION/RECEPTION SYSTEM AND OPTICAL TRANSMISSION/RECE...
Publication number
20240223921
Publication date
Jul 4, 2024
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
BURST OPTICAL RELAYING DEVICE AND BURST OPTICAL RELAYING METHOD
Publication number
20230155673
Publication date
May 18, 2023
Nippon Telegraph and Telephone Corporation
Kana MASUMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL DEMULTIPLEXER, OPTICAL SEPARATION DEVICE, OPTICAL TRANSMISS...
Publication number
20220360355
Publication date
Nov 10, 2022
Nippon Telegraph and Telephone Corporation
Kana Masumoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL RECEIVER
Publication number
20220352990
Publication date
Nov 3, 2022
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
SERVER, OPTICAL TRANSMISSION METHOD, OPTICAL TRANSMISSION SYSTEM, A...
Publication number
20220209870
Publication date
Jun 30, 2022
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL BRANCH INSERTION DEVICE AND OPTICAL TRANSMISSION SYSTEM USI...
Publication number
20220182169
Publication date
Jun 9, 2022
Nippon Telegraph and Telephone Corporation
Masahiro NAKAGAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL BRANCH INSERTION DEVICE AND OPTICAL TRANSMISSION SYSTEM USI...
Publication number
20220149968
Publication date
May 12, 2022
Nippon Telegraph and Telephone Corporation
Masahiro NAKAGAWA
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND UNUSED CHANNEL VERIFICATION METHOD
Publication number
20220006522
Publication date
Jan 6, 2022
Nippon Telegraph and Telephone Corporation
Kana MASUMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM AND UNUSED CHANNEL VERIFICATION METHOD
Publication number
20210409113
Publication date
Dec 30, 2021
Nippon Telegraph and Telephone Corporation
Kana MASUMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
DISPERSION COMPENSATION SYSTEM AND DISPERSION COMPENSATION METHOD
Publication number
20210266069
Publication date
Aug 26, 2021
Nippon Telegraph and Telephone Corporation
Kana MASUMOTO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSCEIVER
Publication number
20210143911
Publication date
May 13, 2021
Nippon Telegraph and Telephone Corporation
Toshiya Matsuda
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTER, OPTICAL RECEIVER, AND OPTICAL TRANSMISSION SYSTEM
Publication number
20200127757
Publication date
Apr 23, 2020
Nippon Telegraph and Telephone Corporation
Toshiya MATSUDA
H04 - ELECTRIC COMMUNICATION TECHNIQUE