Yukiji Yamauchi

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Kokubunji, JP

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Patents Grantslast 30 patents

Information Patent Grant
High-speed ring lan system
- Patent number 5,247,518
- Issue date Sep 21, 1993
- Hitachi, Ltd.
- Yoshihiro Takiyasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High-speed ring LAN system
- Patent number 5,103,447
- Issue date Apr 7, 1992
- Hitachi, Ltd.
- Yoshihiro Takiyasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System configuration of wireless PBX and communication method therefor
- Patent number 4,955,050
- Issue date Sep 4, 1990
- Hitachi, Ltd.
- Yukiji Yamauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Portable wireless communication systems
- Patent number 4,881,271
- Issue date Nov 14, 1989
- Hitachi, Ltd.
- Yukiji Yamauchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE