Yumiko Watanabe

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Portable telephone system
- Patent number 5,838,770
- Issue date Nov 17, 1998
- Hitachi, Ltd.
- Yutaka Fukushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cordless subunit facsimile system
- Patent number 5,805,678
- Issue date Sep 8, 1998
- Hitachi, Ltd.
- Teiji Okamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of communications between telephone and facsimile apparatus...
- Patent number 5,748,715
- Issue date May 5, 1998
- Hitachi, Ltd.
- Tetsuo Shinagawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Portable telephone system
- Patent number 5,579,370
- Issue date Nov 26, 1996
- Hitachi, Ltd.
- Yutaka Fukushima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE