Patents by Inventor Michel G. Mathieu

Michel G. Mathieu 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).

  • Disc and videodisc reader head positioning control system
    Patent number: 4555736
    Abstract: A videodisc reader head positioning control system stores the keyed-in address for a desired picture frame and compares it to the track address for the frames during passage of the reader head toward the desired frame. Logic circuitry distinguishes the difference between the desired address and the address of the head's current position in order to control the head positioning unit at a fast, intermediate, or precision speed. Upon reaching the desired address, the logic circuitry maintains the position of the head for stop frame display of the picture information.
    Type: Grant
    Filed: April 19, 1982
    Date of Patent: November 26, 1985
    Assignees: Etablissement Public de Diffusion dit Telediffusion de France, Andre J. L. Le Rodallec
    Inventors: Michel G. Mathieu, Andre J. L. Le Rodallec