Tsutomu Hatakeyama

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Tachikawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
System for aiding in use of a facility arranged to equip visitors w...
- Patent number 6,189,783
- Issue date Feb 20, 2001
- Hitachi, Ltd.
- Yukie Motomiya
- G06 - COMPUTING CALCULATING COUNTING