Patents by Inventor Diane M. Todd

Diane M. Todd 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).

  • Trilingual educational block
    Patent number: 5152690
    Abstract: Six sided blocks contain visual and tactile letters and words in English, Braille and American Signa Language (ASL). Raised surfaces on the blocks can be inked and used for trilingual printing on paper. With two letters per block a set of thirteen blocks is suitable for learning by hearing, deaf blind and deaf/blind. Adjacent sides of a block can serve to represent ASL signs which require movement or two hand positions.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: October 6, 1992
    Inventor: Diane M. Todd