Tomoyuki Akiyama

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Yamagata-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Opaque silica glass article having transparent portion and process...
- Patent number 6,405,563
- Issue date Jun 18, 2002
- Tosoh Corporation
- Hiroya Nagata
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
High purity transparent silica glass
- Patent number 6,133,178
- Issue date Oct 17, 2000
- Tosoh Corporation
- Nobusuke Yamada
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Process for production of pure transparent quartz
- Patent number 5,665,133
- Issue date Sep 9, 1997
- Tosoh Corporation
- Koichi Orii
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Method of producing oxynitride glass
- Patent number 5,229,336
- Issue date Jul 20, 1993
- Tosoh Corporation
- Tomoyuki Akiyama
- C03 - GLASS MINERAL OR SLAG WOOL

Patents Applicationslast 30 patents

Information Patent Application
OPAQUE SILICA GLASS ARTICLE HAVING TRANSPARENT PORTION AND PROCESS...
- Publication number 20020078709
- Publication date Jun 27, 2002
- TOSOH CORPORATION
- Hiroya Nagata
- C03 - GLASS MINERAL OR SLAG WOOL