Kenji Kasuga

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Communication system
- Patent number 8,732,316
- Issue date May 20, 2014
- Hitachi, Ltd.
- Kenji Kasuga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Presence information management system and presence information man...
- Patent number 8,086,717
- Issue date Dec 27, 2011
- Hitachi, Ltd.
- Tatsuhiko Miyata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Presence information management system and presence information man...
- Patent number 7,720,952
- Issue date May 18, 2010
- Hitachi, Ltd.
- Tatsuhiko Miyata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Presence information sharing method and system
- Patent number 7,716,293
- Issue date May 11, 2010
- Hitachi, Ltd.
- Kenji Kasuga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Presence server, session control server, and packet relay system
- Patent number 7,668,911
- Issue date Feb 23, 2010
- Hitachi, Ltd.
- Tatsuhiko Miyata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Push-type information delivery method, push-type information delive...
- Patent number 7,571,207
- Issue date Aug 4, 2009
- Hitachi, Ltd.
- Masahiro Yoshizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
COMMUNICATION SYSTEM
- Publication number 20120036269
- Publication date Feb 9, 2012
- Hitachi, Ltd.
- Kenji Kasuga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Presence information management system and presence information man...
- Publication number 20100191802
- Publication date Jul 29, 2010
- Hitachi Displays, Ltd.
- Tatsuhiko Miyata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Presence information management system and presence information man...
- Publication number 20060224671
- Publication date Oct 5, 2006
- Hitachi, Ltd.
- Tatsuhiko Miyata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Push-type information delivery method, push-type information delive...
- Publication number 20050251557
- Publication date Nov 10, 2005
- Hitachi., Ltd.
- Masahiro Yoshizawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Presence server, session control server, and packet relay system
- Publication number 20050216595
- Publication date Sep 29, 2005
- Tatsuhiko Miyata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Presence information sharing method and system
- Publication number 20050210113
- Publication date Sep 22, 2005
- Kenji Kasuga
- H04 - ELECTRIC COMMUNICATION TECHNIQUE