Takao Yamamoto

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Tanashi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Telephone apparatus for selective operation in a normal and reperto...
- Patent number 4,567,326
- Issue date Jan 28, 1986
- Tokyo Shibaura Denki Kabushiki Kaisha
- Yasuji Sato
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Key telephone system
- Patent number 4,184,054
- Issue date Jan 15, 1980
- Tokyo Shibaura Electric Co., Ltd.
- Shin-ichi Shibata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE