Atsuo Serikawa

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sound/data sharing communications system
- Patent number 6,351,469
- Issue date Feb 26, 2002
- Fujitsu Limited
- Keiichi Otani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Time division multiple access communication system, signal receivin...
- Patent number 6,347,092
- Issue date Feb 12, 2002
- Fujitsu Limited
- Atsuo Serikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication-line-quality measuring system using a conventional si...
- Patent number 6,028,845
- Issue date Feb 22, 2000
- Fujitsu Limited
- Atsuo Serikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and device for two-way communication network
- Patent number 5,960,005
- Issue date Sep 28, 1999
- Fujitsu Limited
- Umihiko Moteki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Calling signal transmission apparatus
- Patent number 4,748,659
- Issue date May 31, 1988
- Fujitsu Limited
- Kiyoshi Kasahara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Battery feed circuit for subscriber line
- Patent number 4,631,366
- Issue date Dec 23, 1986
- Fujitsu Limited
- Kenji Takato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE