Tatsuya Shiragaki

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Device and method for preventing unauthorized reproduction of content
- Patent number 8,886,013
- Issue date Nov 11, 2014
- NEC Corporation
- Tatsuya Shiragaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal repeater and switching device, method of detecting connectin...
- Patent number 7,515,545
- Issue date Apr 7, 2009
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ring network for sharing protection resource by working communicati...
- Patent number 7,280,470
- Issue date Oct 9, 2007
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication device that performs automatic failure recovery and a...
- Patent number 7,043,662
- Issue date May 9, 2006
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
WDM network and WDM network device
- Patent number 6,785,473
- Issue date Aug 31, 2004
- NEC Corp.
- Shinobu Sasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ring network for sharing protection resource by working communicati...
- Patent number 6,657,952
- Issue date Dec 2, 2003
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal monitoring method and apparatus
- Patent number 6,538,779
- Issue date Mar 25, 2003
- NEC Corporation
- Hitoshi Takeshita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication network unit comprising an optical signal con...
- Patent number 6,211,983
- Issue date Apr 3, 2001
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switch device
- Patent number 6,128,115
- Issue date Oct 3, 2000
- NEC Corporation
- Tatsuya Shiragaki
- G02 - OPTICS
Information Patent Grant
Network node for switching quality detector to incoming signal spec...
- Patent number 6,125,104
- Issue date Sep 26, 2000
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication network apparatus and optical switching network
- Patent number 6,115,517
- Issue date Sep 5, 2000
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Network failure restoration method with different recovery performa...
- Patent number 6,023,452
- Issue date Feb 8, 2000
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication network and method for optically detecting a...
- Patent number 5,757,526
- Issue date May 26, 1998
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical network using multiplexed payload and OAM signals
- Patent number 5,663,820
- Issue date Sep 2, 1997
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Hitless switching apparatus and method for optical network
- Patent number 5,471,332
- Issue date Nov 28, 1995
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical cross-connect system with space and wavelength division swi...
- Patent number 5,457,556
- Issue date Oct 10, 1995
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
CONTROL APPARATUS, METHOD, A NON-TRANSITORY COMPUTER READABLE MEDIU...
- Publication number 20180262967
- Publication date Sep 13, 2018
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
DEVICE AND METHOD FOR PREVENTING UNAUTHORIZED REPRODUCTION OF CONTENT
- Publication number 20100021132
- Publication date Jan 28, 2010
- TATSUYA SHIRAGAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD AND DEVICE FOR RECEIVING AND REPRODUCING CONTENT
- Publication number 20100021130
- Publication date Jan 28, 2010
- TATSUYA SHIRAGAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
METHOD AND DEVICE FOR RECEIVING CONTENT IN A CONTENT DELIVERY SYSTEM
- Publication number 20100023974
- Publication date Jan 28, 2010
- TATSUYA SHIRAGAKI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Signal repeater and switching device, method of detecting connectin...
- Publication number 20050002386
- Publication date Jan 6, 2005
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Ring network for sharing protection resource by working communicati...
- Publication number 20040057375
- Publication date Mar 25, 2004
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication device that performs automatic failure recovery and a...
- Publication number 20020162045
- Publication date Oct 31, 2002
- NEC Corporation
- Tatsuya Shiragaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Tatsuya Shiragaki

Person

Patents Grantslast 30 patents

Device and method for preventing unauthorized reproduction of content

Signal repeater and switching device, method of detecting connectin...

Ring network for sharing protection resource by working communicati...

Communication device that performs automatic failure recovery and a...

WDM network and WDM network device

Ring network for sharing protection resource by working communicati...

Optical signal monitoring method and apparatus

Optical communication network unit comprising an optical signal con...

Optical switch device

Network node for switching quality detector to incoming signal spec...

Optical communication network apparatus and optical switching network

Network failure restoration method with different recovery performa...

Optical communication network and method for optically detecting a...

Optical network using multiplexed payload and OAM signals

Hitless switching apparatus and method for optical network

Optical cross-connect system with space and wavelength division swi...

Patents Applicationslast 30 patents

CONTROL APPARATUS, METHOD, A NON-TRANSITORY COMPUTER READABLE MEDIU...

DEVICE AND METHOD FOR PREVENTING UNAUTHORIZED REPRODUCTION OF CONTENT

METHOD AND DEVICE FOR RECEIVING AND REPRODUCING CONTENT

METHOD AND DEVICE FOR RECEIVING CONTENT IN A CONTENT DELIVERY SYSTEM

Signal repeater and switching device, method of detecting connectin...

Ring network for sharing protection resource by working communicati...

Communication device that performs automatic failure recovery and a...