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Hiroyuki Iwata
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Yokohama-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Polarization compensator and wavelength division multiplexing appar...
Patent number
6,762,837
Issue date
Jul 13, 2004
Fujitsu Limited
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communications system
Patent number
6,721,507
Issue date
Apr 13, 2004
Fujitsu Limited
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communications system
Patent number
6,414,770
Issue date
Jul 2, 2002
Fujitsu Limited
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical communications system
Patent number
6,233,076
Issue date
May 15, 2001
Fujitsu Limited
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Signal light outputting apparatus and optical transmission system h...
Patent number
6,204,945
Issue date
Mar 20, 2001
Fujitsu Limited
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Light branching and insertion apparatus and optical transmission sy...
Patent number
5,956,167
Issue date
Sep 21, 1999
Fujitsu Limited
Hiroyuki Iwata
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Signal light transmitter including variable optical attenuator
Publication number
20040247326
Publication date
Dec 9, 2004
FUJITSU LIMITED
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
System adopting wavelength division multiplexing and method of oper...
Publication number
20040208569
Publication date
Oct 21, 2004
FUJITSU LIMITED
Yoshio Nabeyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Polarization compensator and wavelength division multiplexing appar...
Publication number
20020176080
Publication date
Nov 28, 2002
FUJITSU LIMITED
Hiroyuki Iwata
G01 - MEASURING TESTING
Information
Patent Application
Optical communications system
Publication number
20020126353
Publication date
Sep 12, 2002
FUJITSU LIMITED
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical communications system
Publication number
20010015838
Publication date
Aug 23, 2001
Hiroyuki Iwata
H04 - ELECTRIC COMMUNICATION TECHNIQUE