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Yoshiki Yamauchi
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical multiplexing circuit and optical multiplexer
Patent number
6,842,560
Issue date
Jan 11, 2005
NTT Electronics Corporation
Yoshiki Yamauchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Heterojunction bipolar transistor
Patent number
5,019,890
Issue date
May 28, 1991
Nippon Telegraph & Telephone Corporation
Tadao Ishibashi
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
Optical multiplexing circuit and optical multiplexer
Publication number
20020126341
Publication date
Sep 12, 2002
NTT ELECTRONICS CORPORATION and NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Yoshiki Yamauchi
G02 - OPTICS