Wai Yeung Cheung

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Hong Kong SAR, CN

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Patents Grantslast 30 patents

Information Patent Grant
Shut-off device for pipe
- Patent number 9,377,125
- Issue date Jun 28, 2016
- THE HONG KONG AND CHINA GAS COMPANY LIMITED
- Wai Keung Carson Lee
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
SHUT-OFF DEVICE FOR PIPE
- Publication number 20140332096
- Publication date Nov 13, 2014
- The Hong Kong and China Gas Company Limited
- Wai Keung Carson Lee
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC