YUKIO HAYASHI

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical transport system and optical node
- Patent number 8,818,190
- Issue date Aug 26, 2014
- Hitachi, Ltd.
- Yukio Hayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical add/drop multiplexer
- Patent number 8,009,987
- Issue date Aug 30, 2011
- Hitachi, Ltd.
- Yasuhiro Uchiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal changeover device and optical signal changeover method
- Patent number 7,844,177
- Issue date Nov 30, 2010
- Hitachi, Ltd.
- Chanthan Winh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical crossconnect apparatus and optical transmission system
- Patent number 7,272,314
- Issue date Sep 18, 2007
- Hitachi, Ltd.
- Yasuyuki Fukashiro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical one-to-one protection switching apparatus
- Patent number 6,975,811
- Issue date Dec 13, 2005
- Hitachi, Ltd.
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical crossconnect apparatus and optical transmission system
- Patent number 6,813,445
- Issue date Nov 2, 2004
- Hitachi, Ltd.
- Yasuyuki Fukashiro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal switching apparatus
- Patent number 6,434,286
- Issue date Aug 13, 2002
- Hitachi, Ltd.
- Yukio Hayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical crossconnect apparatus and optical transmission system
- Patent number 6,362,905
- Issue date Mar 26, 2002
- Hitachi, Ltd.
- Yasuyuki Fukashiro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and system for reducing optical surge
- Patent number 6,341,032
- Issue date Jan 22, 2002
- Hitachi, Ltd.
- Yasuyuki Fukashiro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal switching apparatus
- Patent number 6,334,009
- Issue date Dec 25, 2001
- Hitachi, Ltd.
- Yasuyuki Fukashiro
- G02 - OPTICS
Information Patent Grant
Optical signal switching apparatus
- Patent number 6,229,932
- Issue date May 8, 2001
- Hitachi, Ltd.
- Yasuyuki Fukashiro
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL TRANSPORT SYSTEM AND OPTICAL NODE
- Publication number 20120219289
- Publication date Aug 30, 2012
- Hitachi, Ltd.
- YUKIO HAYASHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL REPEATER, OPTICAL TRANSMISSION APPARATUS, REFLECTION ABNORM...
- Publication number 20110164873
- Publication date Jul 7, 2011
- Hitachi, Ltd.
- YUKIO HAYASHI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical add/drop multiplexer
- Publication number 20080285973
- Publication date Nov 20, 2008
- Yasuhiro Uchiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL SIGNAL CHANGEOVER DEVICE AND OPTICAL SIGNAL CHANGEOVER METHOD
- Publication number 20070212066
- Publication date Sep 13, 2007
- Chanthan Winh
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical crossconnect apparatus and optical transmission system
- Publication number 20050025481
- Publication date Feb 3, 2005
- Yasuyuki Fukashiro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Wavelength tunable optical transmitter, optical transponder and opt...
- Publication number 20040131366
- Publication date Jul 8, 2004
- Hideaki Tsushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical crossconnect apparatus and optical transmission system
- Publication number 20020093712
- Publication date Jul 18, 2002
- Yasuyuki Fukashiro
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Protection switching apparatus for 1 + 1 optical transmission lines
- Publication number 20010046074
- Publication date Nov 29, 2001
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

YUKIO HAYASHI

Person

Patents Grantslast 30 patents

Optical transport system and optical node

Optical add/drop multiplexer

Optical signal changeover device and optical signal changeover method

Optical crossconnect apparatus and optical transmission system

Optical one-to-one protection switching apparatus

Optical crossconnect apparatus and optical transmission system

Optical signal switching apparatus

Optical crossconnect apparatus and optical transmission system

Method and system for reducing optical surge

Optical signal switching apparatus

Optical signal switching apparatus

Patents Applicationslast 30 patents

OPTICAL TRANSPORT SYSTEM AND OPTICAL NODE

OPTICAL REPEATER, OPTICAL TRANSMISSION APPARATUS, REFLECTION ABNORM...

Optical add/drop multiplexer

OPTICAL SIGNAL CHANGEOVER DEVICE AND OPTICAL SIGNAL CHANGEOVER METHOD

Optical crossconnect apparatus and optical transmission system

Wavelength tunable optical transmitter, optical transponder and opt...

Optical crossconnect apparatus and optical transmission system

Protection switching apparatus for 1 + 1 optical transmission lines