Kunioki Oyagi

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Carbon granule microphone with molded resin-conductive carbon elect...
- Patent number 4,205,206
- Issue date May 27, 1980
- Iwatsu Electric Co. Ltd.
- Tetsusuke Eishima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE