Shigeru Oosawa

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Patents Grantslast 30 patents

Information Patent Grant
Radiowave absorbing body of the high electrical power-resistant type
- Patent number 4,939,024
- Issue date Jul 3, 1990
- Grace Japan Kabushiki Kaisha
- Shigeru Oosawa
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES