GUOZHEN ZHAO

Follow

Person

Xuzhou, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Fissured substrata water pumping apparatus and method
- Patent number 9,850,747
- Issue date Dec 26, 2017
- CHINA UNIVERSTIY OF MINING AND TECHNOLOGY
- Zhanguo Ma
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
FISSURED SUBSTRATA WATER PUMPING APPARATUS AND METHOD
- Publication number 20160138374
- Publication date May 19, 2016
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- ZHANGUO MA
- E21 - EARTH DRILLING MINING
Information Patent Application
ANCHORING AND ANTI-CLOGGING DRILL ROD FOR COAL MINE FLOOR
- Publication number 20160138397
- Publication date May 19, 2016
- CHINA UNIVERSITY OF MINING AND TECHNOLOGY
- Zhanguo Ma
- E21 - EARTH DRILLING MINING