Masato Hata

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Data and speech transmission device
- Patent number 5,365,576
- Issue date Nov 15, 1994
- Ricos Co., Ltd.
- Mihoji Tsumura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Information input/output controller for telephone lines
- Patent number 5,299,258
- Issue date Mar 29, 1994
- Ricos Co., Ltd.
- Mihoji Tsumura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Distributed telephone conference control device
- Patent number 5,291,548
- Issue date Mar 1, 1994
- Ricos Co., Ltd.
- Mihoji Tsumura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE