Rituko Kanazawa

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Kamakura, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electronic book distributing system by use of purchase certificate...
- Patent number 6,895,393
- Issue date May 17, 2005
- Hitachi, Ltd.
- Toru Numata
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Schedule management support system
- Patent number 5,781,731
- Issue date Jul 14, 1998
- Hitachi, Ltd.
- Hiroyuki Koreeda
- G06 - COMPUTING CALCULATING COUNTING