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Akihiro Yamagishi
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Kanagawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical transmission characteristics compensating method and optica...
Patent number
11,558,114
Issue date
Jan 17, 2023
NTT Electronics Corporation
Akihiro Yamagishi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission characteristics estimation method, optical tra...
Patent number
11,228,366
Issue date
Jan 18, 2022
NTT Electronics Corporation
Akihiro Yamagishi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission characteristic estimation method, optical tran...
Patent number
10,637,569
Issue date
Apr 28, 2020
NTT Electronics Corporation
Akihiro Yamagishi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Compensation coefficient calculation method
Patent number
10,396,895
Issue date
Aug 27, 2019
NTT Electronics Corporation
Tomohiro Takamuku
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Variable division method and variable divider
Patent number
7,180,341
Issue date
Feb 20, 2007
Nippon Telegraph and Telephone Public Corporation
Mitsuru Harada
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Phase locked loop
Patent number
6,759,912
Issue date
Jul 6, 2004
Nippon Telegraph and Telephone Corporation
Akihiro Yamagishi
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Image-rejection receiver
Patent number
6,516,186
Issue date
Feb 4, 2003
Nippon Telegraph and Telephone Corporation
Akihiro Yamagishi
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Programmable delay generator and application circuits having said d...
Patent number
6,188,261
Issue date
Feb 13, 2001
Nippon Telegraph and Telephone Corporation
Hideyuki Nosaka
G06 - COMPUTING CALCULATING COUNTING
Patents Applications
last 30 patents
Information
Patent Application
OPTICAL TRANSMISSION CHARACTERISTICS COMPENSATING METHOD AND OPTICA...
Publication number
20220173807
Publication date
Jun 2, 2022
NTT ELECTRONICS CORPORATION
Akihiro YAMAGISHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION CHARACTERISTICS ESTIMATION METHOD, OPTICAL TRA...
Publication number
20210328666
Publication date
Oct 21, 2021
NTT ELECTRONICS CORPORATION
Akihiro YAMAGISHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
OPTICAL TRANSMISSION CHARACTERISTIC ESTIMATION METHOD, OPTICAL TRAN...
Publication number
20200036440
Publication date
Jan 30, 2020
NTT ELECTRONICS CORPORATION
Akihiro YAMAGISHI
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
COMPENSATION COEFFICIENT CALCULATION METHOD
Publication number
20190036613
Publication date
Jan 31, 2019
NTT ELECTRONICS CORPORATION
Tomohiro TAKAMUKU
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Variable division method and variable divider
Publication number
20060145736
Publication date
Jul 6, 2006
Mitsuru Harada
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
Two-modulus prescaler circuit
Publication number
20050116258
Publication date
Jun 2, 2005
Akihiro Yamagishi
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Application
Phase locked loop
Publication number
20030146794
Publication date
Aug 7, 2003
Nippon Telegraph and Telephone Corporation
Akihiro Yamagishi
H03 - BASIC ELECTRONIC CIRCUITRY