Lei Ji

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Zhuhai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Interchangeable lock core and opening method thereof
- Patent number 8,890,651
- Issue date Nov 18, 2014
- Youtech, Inc.
- Shuqiang Jin
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
INTERCHANGEABLE LOCK CORE AND OPENING METHOD THEREOF
- Publication number 20130024038
- Publication date Jan 24, 2013
- YOUTECH, INC.
- Shuqiang Jin
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES