Patents by Inventor Mary Louise Hart

Mary Louise Hart 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).

  • Visual communication tool for children
    Patent number: 4063369
    Abstract: A visual communication tool for children in which non-worded expression can be displayed in pictorial form. By utilizing a series of provided figures, a child is capable of creating his own storybook so as to communicate his creativity to others through the pictorial display or with an accompanying explanation.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: December 20, 1977
    Inventor: Mary Louise Hart