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Atsushi Hamamura
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Kyoto, JP
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last 30 patents
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Patent Grant
Process of producing calcined materials for ferrite magnet
Patent number
5,387,356
Issue date
Feb 7, 1995
Sumitomo Special Metals Co., Ltd.
Atsushi Hamamura
C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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
Process for producing a corrosion resistant permanent magnet
Patent number
4,968,529
Issue date
Nov 6, 1990
Sumitomo Special Metals Co., Ltd.
Atsushi Hamamura
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Corrosion-resistant permanent magnet and method for preparing the same
Patent number
4,959,273
Issue date
Sep 25, 1990
Sumitomo Special Metals Co., Ltd.
Atsushi Hamamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Corrosion resistant permanent magnet
Patent number
4,942,098
Issue date
Jul 17, 1990
Sumitomo Special Metals, Co., Ltd.
Atsushi Hamamura
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...