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Packet switching network
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Patent number 6,760,346
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Issue date Jul 6, 2004
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NEC Corporation
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Yoshihiko Suemura
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical network
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Patent number 6,429,955
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Issue date Aug 6, 2002
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NEC Corporation
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Yoshihiko Suemura
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Bit synchronization circuit
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Patent number 6,373,911
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Issue date Apr 16, 2002
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NEC Corporation
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Akio Tajima
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical transmitter
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Patent number 5,777,772
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Issue date Jul 7, 1998
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NEC Corporation
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Soichiro Araki
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical matrix switch
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Patent number 5,345,326
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Issue date Sep 6, 1994
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NEC Corporation
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Soichiro Araki
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G02 - OPTICS