Hirokazu Yamaguchi

Follow

Person

Tochigi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing extruded seamless hollow materials
- Patent number 4,967,583
- Issue date Nov 6, 1990
- Furukawa Aluminum Co., Ltd.
- Toshio Watanabe
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...