Tadayoshi Yoshioka

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Shizuoka-ken, JP

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Patents Grantslast 30 patents

Information Patent Grant
Carburization and quenching apparatus
- Patent number 6,149,860
- Issue date Nov 21, 2000
- NTN Corporation
- Taichiro Furukawa
- C21 - METALLURGY OF IRON
Information Patent Grant
Hardening process and apparatus for holed flat parts
- Patent number 5,667,603
- Issue date Sep 16, 1997
- NTN Corporation
- Masanori Ichikawa
- C21 - METALLURGY OF IRON