Atsuo Ishizuka

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Patents Grantslast 30 patents

Information Patent Grant
Optical-switch testing apparatus, optical-signal switching apparatu...
- Patent number 7,912,329
- Issue date Mar 22, 2011
- Fujitsu Limited
- Yoshio Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical-switch testing apparatus, optical-signal switching apparatu...
- Patent number 7,596,290
- Issue date Sep 29, 2009
- Fujitsu Limited
- Yoshio Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical signal switching apparatus, and controller and method for c...
- Patent number 7,248,759
- Issue date Jul 24, 2007
- Fujitsu Limited
- Atsuo Ishizuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical-switch testing apparatus, optical-signal switching apparatu...
- Patent number 7,239,773
- Issue date Jul 3, 2007
- Fujitsu Limited
- Yoshio Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical exchange for wavelength division multiplexed (WDM) network,...
- Patent number 7,233,741
- Issue date Jun 19, 2007
- Fujitsu Limited
- Atsuo Ishizuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor laser driver circuit
- Patent number 6,256,329
- Issue date Jul 3, 2001
- Fujitsu Limited
- Atsuo Ishizuka
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL-SWITCH TESTING APPARATUS, OPTICAL-SIGNAL SWITCHING APPARATU...
- Publication number 20090304329
- Publication date Dec 10, 2009
- FUJITSU LIMITED
- Yoshio Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL-SWITCH TESTING APPARATUS, OPTICAL-SIGNAL SWITCHING APPARATU...
- Publication number 20070230954
- Publication date Oct 4, 2007
- FUJITSU LIMITED
- Yoshio Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical-switch testing apparatus, optical-signal switching apparatu...
- Publication number 20050286891
- Publication date Dec 29, 2005
- FUJITSU LIMITED
- Yoshio Sakai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical signal switching apparatus, and controller and method for c...
- Publication number 20050129344
- Publication date Jun 16, 2005
- FUJITSU LIMITED
- Atsuo Ishizuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical exchange for wavelength division multiplexed (WDM) network,...
- Publication number 20030081283
- Publication date May 1, 2003
- FUJITSU LIMITED
- Atsuo Ishizuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE