Kuniyasu Hayashi

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cross-connection network using time switch
- Patent number 5,144,620
- Issue date Sep 1, 1992
- NEC Corporation
- Yasutoshi Ishizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cross-connection network using time switch
- Patent number 4,935,921
- Issue date Jun 19, 1990
- NEC Corporation
- Yasutoshi Ishizaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE