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Pi-Chao Chang

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  • Dali City, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Circular cutter
    • Patent number 10,232,522
    • Issue date Mar 19, 2019
    • DONWEI MACHINERY IND. CO., LTD.
    • Pi-Chao Chang
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Grant

    Fabric folding machine
    • Patent number 9,833,030
    • Issue date Dec 5, 2017
    • Donwei Machinery Ind. Co., Ltd.
    • Pi-chao Chang
    • A41 - WEARING APPAREL
  • Information Patent Grant

    Knitting loom
    • Patent number 9,234,306
    • Issue date Jan 12, 2016
    • Pi-Chao Chang
    • D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
  • Information Patent Grant

    Cutting mat
    • Patent number D675259
    • Issue date Jan 29, 2013
    • Pi Chao Chang
    • D19 - Office supplies
  • Information Patent Grant

    Knife sharpening device of circular knife
    • Patent number 8,267,752
    • Issue date Sep 18, 2012
    • Pi-Chao Chang
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Detachable threader
    • Patent number 8,020,735
    • Issue date Sep 20, 2011
    • Pi-Chao Chang
    • D05 - SEWING EMBROIDERING TUFTING
  • Information Patent Grant

    Craft knife for cutting circles
    • Patent number D633771
    • Issue date Mar 8, 2011
    • Pi-Chao Chang
    • D08 - Tools and hardware
  • Information Patent Grant

    Dual-use circular knife
    • Patent number D633361
    • Issue date Mar 1, 2011
    • Pi-Chao Chang
    • D08 - Tools and hardware
  • Information Patent Grant

    Rotary cutter
    • Patent number 7,204,023
    • Issue date Apr 17, 2007
    • Pi-Chao Chang
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Grant

    Measuring device
    • Patent number 7,100,295
    • Issue date Sep 5, 2006
    • Pi-Chao Chang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Grant

    Scissors
    • Patent number D523307
    • Issue date Jun 20, 2006
    • Pi Chao Chang
    • D08 - Tools and hardware

Patents Applicationslast 30 patents

  • Information Patent Application

    CIRCULAR CUTTER
    • Publication number 20190061189
    • Publication date Feb 28, 2019
    • Donwei Machinery Ind. Co., Ltd.
    • Pi-Chao CHANG
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Application

    FABRIC FOLDING MACHINE
    • Publication number 20170347732
    • Publication date Dec 7, 2017
    • Donwei Machinery Ind. Co., Ltd.
    • Pi-chao Chang
    • A41 - WEARING APPAREL
  • Information Patent Application

    KNIFE SHARPENING DEVICE FOR CIRCULAR KNIFE
    • Publication number 20150375353
    • Publication date Dec 31, 2015
    • Donwei Machinery Ind. Co., Ltd.
    • Pi-chao CHANG
    • B24 - GRINDING POLISHING
  • Information Patent Application

    Identification structure for a patchwork ruler
    • Publication number 20150000146
    • Publication date Jan 1, 2015
    • Pi-Chao Chang
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    COMBINED PAD STRUCTURE
    • Publication number 20140061427
    • Publication date Mar 6, 2014
    • PI-CHAO CHANG
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    KNIFE SHARPENING DEVICE OF CIRCULAR KNIFE
    • Publication number 20110277594
    • Publication date Nov 17, 2011
    • Pi-Chao Chang
    • B24 - GRINDING POLISHING
  • Information Patent Application

    Detachable threader
    • Publication number 20100206206
    • Publication date Aug 19, 2010
    • Pi-Chao Chang
    • D05 - SEWING EMBROIDERING TUFTING
  • Information Patent Application

    Moving and locating device of padding plate
    • Publication number 20100108848
    • Publication date May 6, 2010
    • Pi-Chao Chang
    • F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
  • Information Patent Application

    Dual-use knife having a circular blade and a guide rod combined tog...
    • Publication number 20080250654
    • Publication date Oct 16, 2008
    • Pi-Chao Chang
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Application

    Dual-use knife for cutting a circle and a straight line
    • Publication number 20080244911
    • Publication date Oct 9, 2008
    • Pi-Chao Chang
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING
  • Information Patent Application

    Rotary cutter
    • Publication number 20060236551
    • Publication date Oct 26, 2006
    • Pi-Chao Chang
    • B26 - HAND CUTTING TOOLS CUTTING SEVERING