Patents by Inventor John R. Bradford

John R. Bradford 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).

  • Stereo image display device
    Patent number: 4691358
    Abstract: An apparatus is disclosed which provides a display of the stereo image and aural perspective of stereophonic sounds. Left and right signal are processed to form rectified sum and difference signals which are applied to the signals which are applied to the vertical and horizontal deflection electrodes of an oscilloscope.
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: September 1, 1987
    Inventor: John R. Bradford