Patents by Inventor Robert J. Livingston

Robert J. Livingston 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).

  • Audio-visual device
    Patent number: 4043651
    Abstract: An audio-visual reproducing device is disclosed which utilizes a program unit having a structure for producing an audio signal and carrying a plurality of visual representations. The program unit is mounted in the device so that a rotatable pick-up is moved along the structure for producing an audio signal in order to obtain an audio output. As such an audio output is obtained a separate optical structure projects a single one of the visual representation so that such representation may be observed.
    Type: Grant
    Filed: April 8, 1966
    Date of Patent: August 23, 1977
    Inventor: Robert J. Livingston