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Toyohisa Fujita
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Sendai, JP
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last 30 patents
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Patent Grant
Method of recovering sulfur from minerals and other sulfur-containi...
Patent number
6,696,037
Issue date
Feb 24, 2004
Dowa Mining Co., Ltd.
Yoshiyuki Watanabe
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Magnetic fluid and process for the production thereof
Patent number
6,440,322
Issue date
Aug 27, 2002
Nittetsu Mining Co., Ltd.
Young-sam Kim
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Electrorheological magnetic fluid and process for producing the same
Patent number
6,159,396
Issue date
Dec 12, 2000
Fujita; Toyohisa
Toyohisa Fujita
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information
Patent Grant
Electrorheological magnetic fluid and process for producing the same
Patent number
5,714,084
Issue date
Feb 3, 1998
Toyohisa Fujita
Toyohisa Fujita
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information
Patent Grant
Electrorheological magnetic fluid and process for producing the same
Patent number
5,507,967
Issue date
Apr 16, 1996
Fujita; Toyohisa
Toyohisa Fujita
C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information
Patent Grant
Method and device of separating materials of different density by f...
Patent number
4,347,124
Issue date
Aug 31, 1982
Nittetsu Mining Co., Ltd.
Junzo Shimoiizaka
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...