Chung Jie Vinsing CHING

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North Point, HK

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Patents Grantslast 30 patents

Information Patent Grant
Hard-rock core barrel roller cutter assembly
- Patent number 9,458,673
- Issue date Oct 4, 2016
- Chung Jie Vinsing Ching
- B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

Information Patent Application
HARD-ROCK CORE BARREL ROLLER CUTTER ASSEMBLY
- Publication number 20150322723
- Publication date Nov 12, 2015
- Chung Jie Vinsing CHING
- E21 - EARTH DRILLING MINING