Patents by Inventor Donald P. Parks

Donald P. Parks 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).

  • Digital audio output device
    Patent number: 4000565
    Abstract: An apparatus is disclosed for converting silent digital visual display characters into sequentially enunciated audible tones which are digitally coded in serial form. Blind or visually handicapped persons can recognize the audio tone codes to comprehend the visual characters in the optical display.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: January 4, 1977
    Assignee: International Business Machines Corporation
    Inventors: Albert W. Overby, Donald P. Parks