Pui Hang KO

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Shatin, HK

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Patents Grantslast 30 patents

Information Patent Grant
Silicon hairspring
- Patent number 9,903,049
- Issue date Feb 27, 2018
- Master Dynamic Limited
- Ho Ching
- C30 - CRYSTAL GROWTH
Information Patent Grant
Stress-relief elastic structure of hairspring collet
- Patent number 8,882,341
- Issue date Nov 11, 2014
- Master Dynamic Limited
- Siu Kay Chu
- G04 - HOROLOGY

Patents Applicationslast 30 patents

Information Patent Application
SILICON HAIRSPRING
- Publication number 20160238994
- Publication date Aug 18, 2016
- Master Dynamic Limited
- Ho CHING
- C30 - CRYSTAL GROWTH
Information Patent Application
STRESS-RELIEF ELASTIC STRUCTURE OF HAIRSPRING COLLET
- Publication number 20140198627
- Publication date Jul 17, 2014
- Master Dynamic Limited
- Siu Kay CHU
- G04 - HOROLOGY