Takuma Hirayoshi

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Sapporo-shi, JP

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Patents Applicationslast 30 patents

Information Patent Application
Apparatus and method for preparing modified data to prevent unautho...
- Publication number 20030193858
- Publication date Oct 16, 2003
- Masaki Yonekawa
- G11 - INFORMATION STORAGE
Information Patent Application
Information recording medium, information recording medium authenti...
- Publication number 20030169662
- Publication date Sep 11, 2003
- Hirotoshi Ohno
- G11 - INFORMATION STORAGE