Ji-Jong Chang

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Tai-Ping, TW

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Patents Grantslast 30 patents

Information Patent Grant
Turret punch
- Patent number 10,166,689
- Issue date Jan 1, 2019
- Ji-Jong Chang
- B26 - HAND CUTTING TOOLS CUTTING SEVERING
Information Patent Grant
Woundable ratchet wrench
- Patent number 7,571,668
- Issue date Aug 11, 2009
- Ji-Jong Chang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Centering punch
- Patent number 6,902,093
- Issue date Jun 7, 2005
- Ji Jong Chang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS

Patents Applicationslast 30 patents

Information Patent Application
TURRET PUNCH
- Publication number 20180001502
- Publication date Jan 4, 2018
- Ji-Jong Chang
- B26 - HAND CUTTING TOOLS CUTTING SEVERING
Information Patent Application
WIRE-TYING TOOL HAVING CLUTCH MECHANISM
- Publication number 20090133775
- Publication date May 28, 2009
- Ji-Jong Chang
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL