Seiichi Yamada

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic head including PbO-V.sub.2 O.sub.5 -P.sub.2 O.sub.5 system...
- Patent number 5,519,555
- Issue date May 21, 1996
- Hitachi, Ltd.
- Takashi Naitoh
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Magnetic head containing amorphous alloy and crystallizable glass
- Patent number 4,816,949
- Issue date Mar 28, 1989
- Hitachi, Ltd.
- Seiichi Yamada
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having layers of amorphous magnetic alloy bonded toge...
- Patent number 4,794,483
- Issue date Dec 27, 1988
- Hitachi, Ltd.
- Takashi Naitoh
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...