TREA

David Liu

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  • West District, Taichung, TW
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Patents Grantslast 30 patents

  • Information Patent Grant

    Pen holder for a clip-board
    • Patent number 5,058,242
    • Issue date Oct 22, 1991
    • David Liu
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Clipboard structure
    • Patent number 4,961,249
    • Issue date Oct 9, 1990
    • David Liu
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
  • Information Patent Grant

    Combination clip-board and case
    • Patent number 4,896,927
    • Issue date Jan 30, 1990
    • David Liu
    • B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER