Kin Choi Chan

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Hong Kong, HK

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Patents Grantslast 30 patents

Information Patent Grant
Annulus ring hole drill
- Patent number 9,322,216
- Issue date Apr 26, 2016
- TOP MARK MECHANICAL EQUIPMENT LIMITED
- Leung Choi Chan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for controlling the operation of cluster drill...
- Patent number 9,175,517
- Issue date Nov 3, 2015
- TOP MARK MECHANICAL EQUIPMENT LIMITED
- Leung Choi Chan
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Annulus Ring Hole Drill
- Publication number 20130306379
- Publication date Nov 21, 2013
- TOP MARK MECHANICAL EQUIPMENT LIMITED
- Leung Choi Chan
- E21 - EARTH DRILLING MINING
Information Patent Application
METHOD AND APPARATUS FOR CONTROLLING THE OPERATION OF CLUSTER DRILL...
- Publication number 20130206481
- Publication date Aug 15, 2013
- TOP MARK MECHANICAL EQUIPMENT LIMITED
- Leung Choi Chan
- E21 - EARTH DRILLING MINING