Patents by Inventor David John DUKE

David John DUKE 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).

  • PERSONAL IDENTIFICATION CODE ENTRY DEVICE AND METHOD THEREFOR
    Publication number: 20120011370
    Abstract: A data entry device for entering characters of a personal identification code comprising a pattern of chambers containing a character of a personal identification code which is required to be selected, said chambers being displayed in different lines on said pattern and each chamber containing a character therein; and a plurality of selection buttons each selection button being capable of selecting a sole line of said lines on said pattern.
    Type: Application
    Filed: July 6, 2010
    Publication date: January 12, 2012
    Inventor: David John DUKE