Makoto Matsuoka

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Izuka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Learning-support device and learning-support method
- Patent number 6,435,880
- Issue date Aug 20, 2002
- Matsushita Electric Industrial Co., Ltd.
- Shinichi Tsumori
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS