Tokunobu Sumida

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Takehara, JA

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Patents Grantslast 30 patents

Information Patent Grant
Method for continuously manufacturing endless lead sheet
- Patent number 4,016,925
- Issue date Apr 12, 1977
- Mitsui Mining & Smelting Co., Ltd.
- Tokunobu Sumida
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Apparatus for continuously manufacturing endless lead sheet
- Patent number 3,958,622
- Issue date May 25, 1976
- Mitsui Mining & Smelting Co., Ltd.
- Tokunobu Sumida
- B22 - CASTING POWDER METALLURGY