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Yuuhiko Hamada
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Semiconductor laser device and optical fiber amplifier
Patent number
6,819,688
Issue date
Nov 16, 2004
Mitsubishi Denki Kabushiki Kaisha
Kiyohide Sakai
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
Semiconductor laser device and optical fiber amplifier
Publication number
20060268396
Publication date
Nov 30, 2006
Kiyohide Sakai
B82 - NANO-TECHNOLOGY
Information
Patent Application
Semiconductor laser device and optical fiber amplifier
Publication number
20050007657
Publication date
Jan 13, 2005
Mitsubishi Denki Kabushiki Kaisha
Kiyohide Sakai
B82 - NANO-TECHNOLOGY
Information
Patent Application
Semiconductor laser device and optical fiber amplifier
Publication number
20030103544
Publication date
Jun 5, 2003
Kiyohide Sakai
B82 - NANO-TECHNOLOGY
Information
Patent Application
Optical isolator, laser module and optical amplifier
Publication number
20030030888
Publication date
Feb 13, 2003
Kiyohide Sakai
G02 - OPTICS
Information
Patent Application
Optical isolator for transmitting light propagating forward and not...
Publication number
20030030889
Publication date
Feb 13, 2003
Kiyohide Sakai
H01 - BASIC ELECTRIC ELEMENTS