Yuzuru Ishioka

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of effecting protection control in communication network and...
- Patent number 7,219,147
- Issue date May 15, 2007
- Fujitsu Limited
- Gaku Kimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication device
- Patent number 6,999,422
- Issue date Feb 14, 2006
- Fujitsu Limited
- Yuzuru Ishioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Subscriber line test system for access network
- Patent number 6,157,704
- Issue date Dec 5, 2000
- Fujitsu Limited
- Yuzuru Ishioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal transmission apparatus and method
- Patent number 5,615,033
- Issue date Mar 25, 1997
- Fujitsu Limited
- Rutsuko Yoshida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ringer unit driving system in a subscriber transmission system
- Patent number 5,483,592
- Issue date Jan 9, 1996
- Fujitsu Limited
- Yuzuru Ishioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Power supply system for optical network unit of a fiber in the loop
- Patent number 5,469,282
- Issue date Nov 21, 1995
- Fujitsu Limited
- Yuzuru Ishioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Testing system for local subscribers
- Patent number 5,195,124
- Issue date Mar 16, 1993
- Fujitsu Limited
- Yuzuru Ishioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Method of effecting protection control in communication network and...
- Publication number 20030233579
- Publication date Dec 18, 2003
- Gaku Kimura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication device
- Publication number 20020071391
- Publication date Jun 13, 2002
- Yuzuru Ishioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE