Kazumasa Mitsuhashi

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Zushi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Transmitter-receiver having ear-piece type acoustic transducing part
- Patent number 5,933,506
- Issue date Aug 3, 1999
- Nippon Telegraph & Telephone Corporation
- Shigeaki Aoki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE