Takuji Mukaemachi

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ring back tone transmission system
- Patent number 4,663,759
- Issue date May 5, 1987
- Hitachi, Ltd.
- Takuji Mukaemachi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Back-up control system implemented with a redundancy scheme for pro...
- Patent number 4,455,645
- Issue date Jun 19, 1984
- Hitachi, Ltd.
- Yoshiaki Mijioka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi-stage switching network controlled by at least three logical...
- Patent number 4,264,895
- Issue date Apr 28, 1981
- Nippon Telegraph and Telephone Public Corp.
- Takuji Mukaemachi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ringing control apparatus
- Patent number 4,145,577
- Issue date Mar 20, 1979
- Hitachi, Ltd.
- Takafumi Kojima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speech path packaging unit including controller containing shift re...
- Patent number 4,113,988
- Issue date Sep 12, 1978
- Hitachi, Ltd.
- Takuji Mukaemachi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE