Tsutomu Yamashita

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic material
- Patent number 5,482,573
- Issue date Jan 9, 1996
- Kabushiki Kaisha Toshiba
- Shinya Sakurada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process of making a contact forming material for a vacuum valve
- Patent number 4,830,821
- Issue date May 16, 1989
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Contact forming material for a vacuum valve
- Patent number 4,777,335
- Issue date Oct 11, 1988
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Methods for preparing high-purity molybdenum or tungsten powder and...
- Patent number 4,762,695
- Issue date Aug 9, 1988
- Kabushiki Kaisha Toshiba
- Hiroshi Endo
- B22 - CASTING POWDER METALLURGY