Patents by Inventor Dorothy L. Corday

Dorothy L. Corday 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).

  • Patent number: 4226420
    Abstract: The invention is a bingo game for blind people. The numbers of the bingo card are made from a tactile material having a surface with a hooked nap. The numbers on the card are covered with discs having a looped nap. Participants in the game can include both those who know the braille system and those who do not.
    Type: Grant
    Filed: July 30, 1979
    Date of Patent: October 7, 1980
    Inventor: Dorothy L. Corday