Ryou Ikezawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for hearing assistance with speech speed contr...
- Patent number 5,305,420
- Issue date Apr 19, 1994
- Nippon Hoso Kyokai
- Akira Nakamura
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS