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Yasuo Tsukuda
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Ome, JP
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last 30 patents
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Patent Grant
Ferromagnetic amorphous alloy
Patent number
RE33022
Issue date
Aug 15, 1989
Hitachi, Ltd.
Shinji Takayama
148 - Metal treatment
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Patent Grant
Ferromagnetic amorphous alloy
Patent number
4,306,908
Issue date
Dec 22, 1981
Hitachi, Ltd.
Shinji Takayama
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Patent Grant
Method for producing optical fiber preform
Patent number
4,259,101
Issue date
Mar 31, 1981
Hitachi, Ltd.
Yasuo Tsukuda
C03 - GLASS MINERAL OR SLAG WOOL