CHING-HSIANG CHANG

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TAINAN COUNTY 711, TW

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Patents Grantslast 30 patents

Information Patent Grant
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- Patent number 8,511,958
- Issue date Aug 20, 2013
- Essence Method Refine Co., Ltd.
- Ching-Hsiang Chang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Versatile fastener
- Patent number 8,348,573
- Issue date Jan 8, 2013
- Essence Method Refine Co., Ltd.
- Ching-Hsiang Chang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
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- Patent number 7,798,756
- Issue date Sep 21, 2010
- Essence Method Refine Co., Ltd.
- Ching-Hsiang Chang
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
SCREW WITH DOUBLE NOTCHES
- Publication number 20110293387
- Publication date Dec 1, 2011
- ESSENCE METHOD REFINE CO., LTD.
- CHING-HSIANG CHANG
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
VERSATILE FASTENER
- Publication number 20110229286
- Publication date Sep 22, 2011
- ESSENCE METHOD REFINE CO., LTD.
- CHING-HSIANG CHANG
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Application
HIGH SCREWING SCREW
- Publication number 20090028665
- Publication date Jan 29, 2009
- ESSENCE METHOD REFINE CO., LTD.
- CHING-HSIANG CHANG
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...