Nobuyuki Sumida

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Sakai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Fabrication method for transformers with an amorphous core
- Patent number 5,226,222
- Issue date Jul 13, 1993
- Daihen Corporation
- Katsumi Hanaoka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of manufacturing wound transformer cores
- Patent number 4,972,573
- Issue date Nov 27, 1990
- Daihen Corporation
- Yasuo Yamamoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Toroidal winding apparatus
- Patent number 4,637,563
- Issue date Jan 20, 1987
- Daihen Corporation
- Kazuhiro Arii
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrical induction apparatus with support inside casing
- Patent number 4,631,509
- Issue date Dec 23, 1986
- Allied Corporation
- Kazuhiro Arii
- H01 - BASIC ELECTRIC ELEMENTS