Tsung-Chih Chang

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Cathode lock and method allowing the cathode lock to switch between...
- Patent number 10,519,695
- Issue date Dec 31, 2019
- SHANGHAI ONE TOP CORPORATION
- Tsung-Chih Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Energy-saving magnetic lock
- Patent number 10,422,168
- Issue date Sep 24, 2019
- SHANGHAI ONE TOP CORPORATION
- Tsung-Chih Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Device for controlling a door
- Patent number 8,292,337
- Issue date Oct 23, 2012
- Shanghai One Top Corporation
- Tsung-Chih Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES

Patents Applicationslast 30 patents

Information Patent Application
Cathode Lock and Method Allowing the Cathode Lock to Switch Between...
- Publication number 20170306653
- Publication date Oct 26, 2017
- SHANGHAI ONE TOP CORPORATION
- Tsung-Chih Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
Energy-Saving Magnetic Lock
- Publication number 20150308170
- Publication date Oct 29, 2015
- SHANGHAI ONE TOP CORPORATION
- Tsung-Chin Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
ELECTROMAGNETIC DOOR LOCK
- Publication number 20090174553
- Publication date Jul 9, 2009
- Tsung Chih Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Application
Device For Controlling a Door
- Publication number 20080290669
- Publication date Nov 27, 2008
- Tsung-Chih Chang
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES