Izumi Yokota

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical OADM transmission system with loopback
- Patent number 8,351,790
- Issue date Jan 8, 2013
- Fujitsu Limited
- Yuhiro Midorikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method, apparatus, and system for evaluating faulty point in multi-...
- Patent number 7,657,176
- Issue date Feb 2, 2010
- Fujitsu Limited
- Izumi Yokota
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system
- Patent number 7,146,071
- Issue date Dec 5, 2006
- Fujitsu Limited
- Izumi Yokota
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system
- Patent number 6,980,745
- Issue date Dec 27, 2005
- Fujitsu Limited
- Hiroyuki Deguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Gain-flattening of an optical amplifier with split-band architecture
- Patent number 6,424,459
- Issue date Jul 23, 2002
- Fujitsu Limited
- Izumi Yokota
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Wavelength-multiplexing optical communication method employing RZ s...
- Patent number 5,875,045
- Issue date Feb 23, 1999
- Fujitsu Limited
- Akira Sugiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical modulator
- Patent number 5,074,631
- Issue date Dec 24, 1991
- Fujitsu Limited
- Hiroshi Hamano
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL TRANSMISSION SYSTEM
- Publication number 20110076017
- Publication date Mar 31, 2011
- Fujitsu Limited
- Yuhiro MIDORIKAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL TRANSMISSION APPARATUS, OPTICAL COMMUNICATION METHOD, AND O...
- Publication number 20100239260
- Publication date Sep 23, 2010
- FUJITSU LIMITED
- Yasushi OIKAWA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method, apparatus, and system for evaluating faulty point in multi-...
- Publication number 20060216038
- Publication date Sep 28, 2006
- FUJITSU LIMITED
- Izumi Yokota
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system
- Publication number 20050259990
- Publication date Nov 24, 2005
- FUJITSU LIMITED
- Izumi Yokota
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system
- Publication number 20030035184
- Publication date Feb 20, 2003
- FUJITSU LIMITED
- Hiroyuki Deguchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE