TREA

Hsi-Huang Lai

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  • Taichung, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum eraser for blackboards
    • Patent number 7,685,672
    • Issue date Mar 30, 2010
    • Hsi-Hur Lai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

Patents Applicationslast 30 patents

  • Information Patent Application

    Vacuum eraser for blackboards
    • Publication number 20060260092
    • Publication date Nov 23, 2006
    • Hsi-Hur Lai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
  • Information Patent Application

    Dustless eraser for blackboards
    • Publication number 20050015923
    • Publication date Jan 27, 2005
    • Hsi-Hur Lai
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES