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Naoki Ando
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Tokyo, JP
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last 30 patents
Information
Patent Grant
Optical ring system
Patent number
6,771,907
Issue date
Aug 3, 2004
NEC Corporation
Yuuki Yoshifuji
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Ring network system, protection method therefor
Patent number
6,526,020
Issue date
Feb 25, 2003
NEC Corporation
Naoki Ando
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Connection switching method and apparatus
Patent number
6,359,860
Issue date
Mar 19, 2002
NEC Corporation
Naoki Ando
H04 - ELECTRIC COMMUNICATION TECHNIQUE