Patents by Inventor John T. Grubb, III

John T. Grubb, III 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).

  • Organizer-keyboard
    Patent number: 4867684
    Abstract: A structure for selectively displaying markers, or crayons, such selectivity being controlled by a keyboard whereby a user, on depressing an activator, may cause the selected marker to be elevated.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: September 19, 1989
    Inventor: John T. Grubb, III