Pi-Hsia Chang

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Feng-Yuan City, TW

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Patents Grantslast 30 patents

Information Patent Grant
Wrench having a ratchet head able to vertically and horizontally ro...
- Patent number 7,281,452
- Issue date Oct 16, 2007
- Pi-Hsia Chang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Adjustable prying bar
- Patent number 7,278,626
- Issue date Oct 9, 2007
- Pi-Hsia Chang
- B66 - HOISTING LIFTING HAULING

Patents Applicationslast 30 patents

Information Patent Application
HAND TOOL WITH PIVOTABLE SHANK
- Publication number 20130269491
- Publication date Oct 17, 2013
- Pi-Hsia CHANG
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Application
Ratchet control structure
- Publication number 20090217789
- Publication date Sep 3, 2009
- Pi-Hsia Chang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Application
Adjustable prying bar
- Publication number 20070158626
- Publication date Jul 12, 2007
- Pi-Hsia Chang
- B66 - HOISTING LIFTING HAULING
Information Patent Application
Wrench having a ratchet head able to vertically and horizontally ro...
- Publication number 20050166718
- Publication date Aug 4, 2005
- Pi-Hsia Chang
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS