Yasuhiro Okajima

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Niihama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Powder material for rare earth-iron-boron based permanent magnets
- Patent number 5,281,250
- Issue date Jan 25, 1994
- Sumitomo Special Metals Company Limited
- Atsushi Hamamura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Alloy target for manufacturing a magneto-optical recording medium
- Patent number 4,915,737
- Issue date Apr 10, 1990
- Sumitomo Metal Mining Company Limited
- Toshio Morimoto
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Process for producing alloy powder containing rare earth metals
- Patent number 4,681,623
- Issue date Jul 21, 1987
- Sumitomo Metal Mining Company Limited
- Yasuhiro Okajima
- B22 - CASTING POWDER METALLURGY