Toshihumi Yuzawa

Follow

Person

Aichi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Control system for synchronous rotation of cutter heads, for use in...
- Patent number 4,939,431
- Issue date Jul 3, 1990
- Ishikawajima-Harima Kukogyo K.K.
- Hidetsugu Yamazaki
- E21 - EARTH DRILLING MINING