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Toshiya Ouchi
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Tokyo, JP
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last 30 patents
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Patent Grant
Mobil communication system for providing IP packet communications a...
Patent number
6,731,621
Issue date
May 4, 2004
Hitachi, Ltd.
Mika Mizutani
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Mobile communication network and control method thereof
Patent number
5,749,053
Issue date
May 5, 1998
Hitachi, Ltd.
Tsutomu Kusaki
H04 - ELECTRIC COMMUNICATION TECHNIQUE