Shiro Ryu

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for measuring an optical transfer characteristic
- Patent number 6,493,074
- Issue date Dec 10, 2002
- Advantest Corporation
- Motoki Imamura
- G01 - MEASURING TESTING
Information Patent Grant
Optical transmission line monitoring apparatus
- Patent number 6,201,599
- Issue date Mar 13, 2001
- Kokusai Denshin Denwa Kabushiki-Kaisha
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for detecting a fault location in an optical fiber line
- Patent number 6,185,020
- Issue date Feb 6, 2001
- Kokusai Denshin Denwa Kabushiki-Kaisha
- Yukio Horiuchi
- G01 - MEASURING TESTING
Information Patent Grant
Optical add-drop device
- Patent number 5,940,197
- Issue date Aug 17, 1999
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light receiving device
- Patent number 5,912,756
- Issue date Jun 15, 1999
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical frequency stabilizer
- Patent number 5,898,719
- Issue date Apr 27, 1999
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication system
- Patent number 5,793,512
- Issue date Aug 11, 1998
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Coherent optical receiver having optically amplified local oscillat...
- Patent number 5,463,461
- Issue date Oct 31, 1995
- Kokusai Denshin Denwa Company, Ltd.
- Yukio Horiuchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical frequency multiplex carrier control system
- Patent number 5,387,992
- Issue date Feb 7, 1995
- Kokusai Denshin Denwa Kabushiki Kaisha
- Tetsuya Miyazaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical phase detection method with orthogonal polarization and pha...
- Patent number 5,317,382
- Issue date May 31, 1994
- Kokusai Denshi Denwa Company, Ltd.
- Tetsuya Miyazaki
- G02 - OPTICS
Information Patent Grant
Long-distance high-speed optical communication scheme
- Patent number 5,140,452
- Issue date Aug 18, 1992
- Kokusai Denshin Denwa Company, Ltd.
- Shu Yamamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for measuring dispersion characteristics of an optical fiber
- Patent number 4,984,884
- Issue date Jan 15, 1991
- Kokusai Denshin Denwa Co., Ltd.
- Shiro Ryu
- G01 - MEASURING TESTING
Information Patent Grant
Controller for semiconductor laser light source
- Patent number 4,977,564
- Issue date Dec 11, 1990
- Kokusai Denshin Denwa Co., Ltd.
- Shiro Ryu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Polarization diversity light receiving system using baseband combining
- Patent number 4,888,817
- Issue date Dec 19, 1989
- Kokusai Denshin Denwa Kabushiki Kaisha
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CONTROL DEVICE, COMPENSATION DEVICE, PROGRAM, AND CONTROL METHOD
- Publication number 20250015894
- Publication date Jan 9, 2025
- MEIJI UNIVERSITY
- Shiro RYU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DETECTION DEVICE, OPTICAL RECEPTION DEVICE, OPTICAL COMMUNICATION S...
- Publication number 20240214067
- Publication date Jun 27, 2024
- MEIJI UNIVERSITY
- Shiro RYU
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system and node adding method
- Publication number 20010019439
- Publication date Sep 6, 2001
- Shiro Ryu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Person

Patents Grantslast 30 patents

Method and apparatus for measuring an optical transfer characteristic

Optical transmission line monitoring apparatus

Apparatus for detecting a fault location in an optical fiber line

Optical add-drop device

Light receiving device

Optical frequency stabilizer

Optical communication system

Coherent optical receiver having optically amplified local oscillat...

Optical frequency multiplex carrier control system

Optical phase detection method with orthogonal polarization and pha...

Long-distance high-speed optical communication scheme

Method for measuring dispersion characteristics of an optical fiber

Controller for semiconductor laser light source

Polarization diversity light receiving system using baseband combining

Patents Applicationslast 30 patents

CONTROL DEVICE, COMPENSATION DEVICE, PROGRAM, AND CONTROL METHOD

DETECTION DEVICE, OPTICAL RECEPTION DEVICE, OPTICAL COMMUNICATION S...

Optical transmission system and node adding method