Masato Arizumi

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and system for selectively communicating with a telephone or...
- Patent number 5,151,932
- Issue date Sep 29, 1992
- Oki Electric Industry Co., Ltd.
- Masato Arizumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication with a non-telephone terminal via a telephone switchi...
- Patent number 4,995,109
- Issue date Feb 19, 1991
- Oki Electric Industry Co., Ltd.
- Masato Arizumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE