TREA

Barbara Plain

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  • Des Plaines, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Talking toy scanner
    • Patent number 6,532,314
    • Issue date Mar 11, 2003
    • Learning Resources, Inc.
    • Barbara Plain
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Digital/analog teaching clock
    • Patent number D377949
    • Issue date Feb 11, 1997
    • Richard Woldenberg
    • D19 - Office supplies