Mikihiro Ichikawa

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Kawasaki, JA

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Patents Grantslast 30 patents

Information Patent Grant
Control circuitry for key telephone apparatus
- Patent number 4,081,625
- Issue date Mar 28, 1978
- Nippon Tsu Shin Kogyo K.K.
- Fumikazu Hamatani
- H04 - ELECTRIC COMMUNICATION TECHNIQUE