Patents by Inventor William J. Keith

William J. Keith 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).

  • Audiometer with interactive graphic display for children
    Patent number: 4862505
    Abstract: A microprocessor-based audiometer for use with children. A color visual display unit is used to display an image digitally stored in memory or on disk drive to attract the childs attention and hold its concentration during testing.The child activates a response switch upon detecting the tones produced by audiometer to the generator. Correct responses are reinforced by progressive alteration of the displayed image to increasingly desirable states.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: August 29, 1989
    Inventors: William J. Keith, Michael Parsons, Russell P. Smith, Christopher J. Glenn, Stephen Bell