Ichirou Takeuchi

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electronic board system and coordinates-inputting pen
- Patent number 6,700,129
- Issue date Mar 2, 2004
- Hitachi Software Engineering Co., Ltd.
- Yutaka Usuda
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Coordinate input pen, and electronic board, coordinate input system...
- Patent number 6,437,314
- Issue date Aug 20, 2002
- Hitachi Software Engineering Co., Ltd.
- Yutaka Usuda
- G06 - COMPUTING CALCULATING COUNTING