Yuji Sakamoto

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Kokubunji, JP

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Patents Grantslast 30 patents

Information Patent Grant
Communication system including portable terminals and fixed terminals
- Patent number 5,157,660
- Issue date Oct 20, 1992
- Hitachi, Ltd.
- Hiroshi Kuwahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio communication system and a portable wireless terminal
- Patent number 5,128,981
- Issue date Jul 7, 1992
- Hitachi, Ltd.
- Nobuo Tsukamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE