TREA

Yuen Po Man

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  • Tai Po, HK
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Patents Grantslast 30 patents

  • Information Patent Grant

    Elapsed time clock
    • Patent number 8,611,192
    • Issue date Dec 17, 2013
    • Learning Resources, Inc.
    • Nancy Balter
    • G04 - HOROLOGY
  • Information Patent Grant

    Digital and analog teaching clock
    • Patent number 5,851,118
    • Issue date Dec 22, 1998
    • Learning Resources, Inc.
    • Richard M. Woldenberg
    • G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS

Patents Applicationslast 30 patents

  • Information Patent Application

    ELAPSED TIME CLOCK
    • Publication number 20120307599
    • Publication date Dec 6, 2012
    • Nancy Balter
    • G04 - HOROLOGY