Naoto Yamada

Follow

Person

Isumi-gun, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Downhole percussion drills
- Patent number 6,752,222
- Issue date Jun 22, 2004
- National Institute of Advanced Industrial Science and Technology
- Hirokazu Karasawa
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Downhole percussion drills
- Publication number 20030111240
- Publication date Jun 19, 2003
- National Institute of Advanced Industrial
- Hirokazu Karasawa
- E21 - EARTH DRILLING MINING