Hisafumi Yoshii

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Kasugai-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Void forming core formwork for concrete beam
- Patent number 7,353,641
- Issue date Apr 8, 2008
- Ecoboard Co., Ltd.
- Hisafumi Yoshii
- B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

Information Patent Application
Formwork for concrete beam
- Publication number 20050229536
- Publication date Oct 20, 2005
- ECOBOARD CO., LTD.
- Hisafumi Yoshii
- B28 - WORKING CEMENT, CLAY, OR STONE