Shigeki Kitajima

Person

Kawasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical switching apparatus and optical communication network system
- Patent number 7,356,257
- Issue date Apr 8, 2008
- Hitachi, Ltd.
- Shigeki Kitajima
- 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 protection switching using 2 by 2 switching functions
- Patent number 7,242,860
- Issue date Jul 10, 2007
- Hitachi America, Ltd.
- Hiroki Ikeda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switching apparatus, optical transmission system and method...
- Patent number 7,206,475
- Issue date Apr 17, 2007
- Hitachi, Ltd.
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus and optical systems
- Patent number 7,194,205
- Issue date Mar 20, 2007
- Hitachi, Ltd.
- Hideaki Tsushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switching apparatus and optical communication network system
- Patent number 6,933,852
- Issue date Aug 23, 2005
- Hitachi, Ltd.
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switching apparatus, optical transmission system and method...
- Patent number 6,839,480
- Issue date Jan 4, 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 switching apparatus, optical transmission system and method...
- Patent number 6,778,725
- Issue date Aug 17, 2004
- Hitachi, Ltd.
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus and optical systems
- Patent number 6,731,874
- Issue date May 4, 2004
- Hitachi, Ltd.
- Hideaki Tsushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission apparatus and optical systems
- Patent number 6,424,445
- Issue date Jul 23, 2002
- Hitachi, Ltd.
- Hideaki Tsushima
- 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
Optical cross-connect system and optical transmission system
- Patent number 6,317,230
- Issue date Nov 13, 2001
- Hitachi, Ltd.
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Fault restoration control method and it's apparatus in a co...
- Patent number 6,304,346
- Issue date Oct 16, 2001
- Hitachi, Ltd.
- Yasushi Sawada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Information transmission system with variable transmission rate
- Patent number 5,815,502
- Issue date Sep 29, 1998
- Hitachi, Ltd.
- Atsushi Saito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical distribution system having time switch
- Patent number 5,790,290
- Issue date Aug 4, 1998
- Hitachi, Ltd.
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical switch having a two-level crossing between input/output opt...
- Patent number 5,761,352
- Issue date Jun 2, 1998
- Hitachi, Ltd.
- Shigeki Kitajima
- G02 - OPTICS
Information Patent Grant
Optical distribution device, optical distribution circuit, and synt...
- Patent number 5,576,872
- Issue date Nov 19, 1996
- Hitachi, Ltd.
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical intensity and phase modulators in an optical transmitter ap...
- Patent number 5,515,196
- Issue date May 7, 1996
- Hitachi, Ltd.
- Shigeki Kitajima
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Information transmission system with variable transmission rate
- Patent number 5,515,368
- Issue date May 7, 1996
- Hitachi, Ltd.
- Atsushi Saito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Homodyne optical receiver equipment
- Patent number 5,323,258
- Issue date Jun 21, 1994
- Hitachi, Ltd.
- Hideaki Tsushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical frequency division multiplexing transmitter and optical fre...
- Patent number 5,305,134
- Issue date Apr 19, 1994
- Hitachi, Ltd.
- Hideaki Tsushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical tuning method and apparatus suitable for selective receptio...
- Patent number 5,144,467
- Issue date Sep 1, 1992
- Hitachi, Ltd.
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
AUTHENTICATION INFORMATION REGISTRATION SYSTEM
- Publication number 20090197571
- Publication date Aug 6, 2009
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
ELECTRONIC ADVERTISEMENT SYSTEM
- Publication number 20090132367
- Publication date May 21, 2009
- Takuji HAMADA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Optical switching apparatus and optical communication network system
- Publication number 20050281556
- Publication date Dec 22, 2005
- Hitachi, Ltd
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical switching apparatus, optical transmission system and method...
- Publication number 20050031346
- Publication date Feb 10, 2005
- Hitachi, Ltd
- Sunao Kakizaki
- 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
Optical transmission apparatus and optical systems
- Publication number 20040179839
- Publication date Sep 16, 2004
- Hideaki Tsushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical switching apparatus, optical transmission system and method...
- Publication number 20040081460
- Publication date Apr 29, 2004
- Hitachi, Ltd
- Sunao Kakizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical protection switching using 2 by 2 switching functions
- Publication number 20040076427
- Publication date Apr 22, 2004
- Hitachi America, Ltd.
- Hiroki Ikeda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical switching apparatus and optical communication network system
- Publication number 20030128979
- Publication date Jul 10, 2003
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission apparatus and optical systems
- Publication number 20020176142
- Publication date Nov 28, 2002
- Hideaki Tsushima
- H01 - BASIC ELECTRIC ELEMENTS
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
Optical cross-connect system and optical transmission system
- Publication number 20010033403
- Publication date Oct 25, 2001
- Shigeki Kitajima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Shigeki Kitajima

Person

Patents Grantslast 30 patents

Optical switching apparatus and optical communication network system

Optical crossconnect apparatus and optical transmission system

Optical protection switching using 2 by 2 switching functions

Optical switching apparatus, optical transmission system and method...

Optical transmission apparatus and optical systems

Optical switching apparatus and optical communication network system

Optical switching apparatus, optical transmission system and method...

Optical crossconnect apparatus and optical transmission system

Optical switching apparatus, optical transmission system and method...

Optical transmission apparatus and optical systems

Optical transmission apparatus and optical systems

Optical crossconnect apparatus and optical transmission system

Optical cross-connect system and optical transmission system

Fault restoration control method and it&#x00027;s apparatus in a co...

Information transmission system with variable transmission rate

Optical distribution system having time switch

Optical switch having a two-level crossing between input/output opt...

Optical distribution device, optical distribution circuit, and synt...

Optical intensity and phase modulators in an optical transmitter ap...

Information transmission system with variable transmission rate

Homodyne optical receiver equipment

Optical frequency division multiplexing transmitter and optical fre...

Optical tuning method and apparatus suitable for selective receptio...

Patents Applicationslast 30 patents

AUTHENTICATION INFORMATION REGISTRATION SYSTEM

ELECTRONIC ADVERTISEMENT SYSTEM

Optical switching apparatus and optical communication network system

Optical switching apparatus, optical transmission system and method...

Optical crossconnect apparatus and optical transmission system

Optical transmission apparatus and optical systems

Optical switching apparatus, optical transmission system and method...

Optical protection switching using 2 by 2 switching functions

Optical switching apparatus and optical communication network system

Optical transmission apparatus and optical systems

Optical crossconnect apparatus and optical transmission system

Optical cross-connect system and optical transmission system

Fault restoration control method and it's apparatus in a co...