Ryuji Nichiyama

Follow

Person

Osaka, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Magnetic head and method for preparing the same
- Patent number 4,238,215
- Issue date Dec 9, 1980
- Matsushita Electric Industrial Co., Ltd.
- Kazuo Yokoyama
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES