Hitoshi Ishiyama

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ball plug valve
- Patent number 6,021,812
- Issue date Feb 8, 2000
- Sekisui Kagaku Kogyo Kabushiki Kaisha & Ichinose Co., Ltd.
- Kunio Iwamoto
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...