Yoshio Kawasumi

Follow

Person

Toda, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Copper foil for printed circuits
- Patent number 5,552,234
- Issue date Sep 3, 1996
- Japan Energy Corporation
- Yoshio Kawasumi
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information Patent Grant
Method for producing high purity electrolytic copper
- Patent number 4,874,436
- Issue date Oct 17, 1989
- Nippon Mining Co., Ltd
- Takashi Ogata
- C30 - CRYSTAL GROWTH
Information Patent Grant
Copper wires used for transmitting sounds or images
- Patent number 4,792,369
- Issue date Dec 20, 1988
- Nippon Mining Co., Ltd
- Takashi Ogata
- C30 - CRYSTAL GROWTH
Information Patent Grant
Method for making a raw board for use in printed circuits
- Patent number 4,231,848
- Issue date Nov 4, 1980
- Nippon Mining Co., Ltd
- Yoshio Kawasumi
- C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR