Yuji Kobayashi

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Fukushima-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Digital telephone switching system having plural terminal devices d...
- Patent number 5,719,855
- Issue date Feb 17, 1998
- Hitachi Telecom Technologies, Ltd.
- Tatsuhiko Ando
- H04 - ELECTRIC COMMUNICATION TECHNIQUE