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Musashino-shi, Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Wavelength dispersion compensation apparatus and wavelength dispers...
Patent number
11,929,784
Issue date
Mar 12, 2024
Nippon Telegraph and Telephone Corporation
Shimpei Shimizu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength dispersion amount calculation apparatus and wavelength d...
Patent number
11,742,950
Issue date
Aug 29, 2023
Nippon Telegraph and Telephone Corporation
Shimpei Shimizu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmitting system and optical transmitting method
Patent number
11,716,144
Issue date
Aug 1, 2023
Nippon Telegraph and Telephone Corporation
Shimpei Shimizu
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMISSION SYSTEM, TRANSMITTER, AND CONTROL METHOD
Publication number
20240413922
Publication date
Dec 12, 2024
Nippon Telegraph and Telephone Corporation
Akira KAWAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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
WAVEGUIDE ESTIMATION APPARATUS, WAVEGUIDE ESTIMATION METHOD AND PRO...
Publication number
20240259095
Publication date
Aug 1, 2024
Nippon Telegraph and Telephone Corporation
Akira KAWAI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION APPARATUS AND OPTICAL AMPLIFICATION METHOD
Publication number
20240248369
Publication date
Jul 25, 2024
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL AMPLIFICATION SYSTEM, OPTICAL AMPLIFICATION APPARATUS AND O...
Publication number
20240250768
Publication date
Jul 25, 2024
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH DISPERSION COMPENSATION APPARATUS AND WAVELENGTH DISPERS...
Publication number
20230059003
Publication date
Feb 23, 2023
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
WAVELENGTH DISPERSION AMOUNT CALCULATION APPARATUS AND WAVELENGTH D...
Publication number
20220407600
Publication date
Dec 22, 2022
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMITTING SYSTEM AND OPTICAL TRANSMITTING METHOD
Publication number
20220399940
Publication date
Dec 15, 2022
Nippon Telegraph and Telephone Corporation
Shimpei SHIMIZU
H04 - ELECTRIC COMMUNICATION TECHNIQUE