Nobusuke Takumi

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Yokkaichi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Cobalt-containing magnetic iron oxide and process for producing the...
- Patent number 5,609,789
- Issue date Mar 11, 1997
- Ishihara Sangyo Kaisha, Ltd.
- Kiyoshi Asano
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Ferromagnetic fine powder for magnetic recording
- Patent number 5,585,032
- Issue date Dec 17, 1996
- Ishihara Sangyo Kaisha, Ltd.
- Kazuo Nakata
- G11 - INFORMATION STORAGE
Information Patent Grant
Process for preparing ferromagnetic fine particles for magnetic rec...
- Patent number 5,246,609
- Issue date Sep 21, 1993
- Ishihara Sangyo Kaisha, Ltd.
- Kazuo Nakata
- G11 - INFORMATION STORAGE
Information Patent Grant
Process for producing cobalt-containing magnetic iron oxide powder
- Patent number 4,594,267
- Issue date Jun 10, 1986
- Ishihara Sangyo Kaisha, Ltd.
- Ichiro Honma
- G11 - INFORMATION STORAGE
Information Patent Grant
Process for producing cobalt-and ferrous iron-containing ferromagne...
- Patent number 4,551,327
- Issue date Nov 5, 1985
- Ishihara Sangyo Kaishi, Limited
- Ichiro Honma
- G11 - INFORMATION STORAGE