Akira Shirayama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Filler sand for a ladle tap hole valve
- Patent number 6,316,106
- Issue date Nov 13, 2001
- NKK Corporation
- Hideto Takasugi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Sliding nozzle filler
- Patent number 6,051,514
- Issue date Apr 18, 2000
- Yamakawa Sangyo Co., Ltd.
- Jun Ayama
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Method for continuous casting of slab
- Patent number 5,307,863
- Issue date May 3, 1994
- NKK Corporation
- Jun Kubota
- B22 - CASTING POWDER METALLURGY

Patents Applicationslast 30 patents

Information Patent Application
Filler sand for a ladle tap hole valve
- Publication number 20020128144
- Publication date Sep 12, 2002
- NKK Corporation
- Manabu Tano
- C21 - METALLURGY OF IRON