Patents by Inventor Esther Goldsen

Esther Goldsen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Building word blocks
    Patent number: 5554062
    Abstract: A toy educational building block set having alphabetical and other indicia for word building. The building blocks are adapted to have letter units selectively secured to their surfaces to form alphabetical blocks.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: September 10, 1996
    Inventor: Esther Goldsen