Patents by Inventor Mohamed Monkade

Mohamed Monkade 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).

  • Patent number: 4775224
    Abstract: A method applicable to a liquid crystal cell comprising two parallel transparent plates (11, 12) coated on their facing inert faces with electrode-forming conductive coatings (14,15), and with a shim (13) interposed between the plates, the space in said cells between said plates containing a substance (17) including molecules which are endowed with nematic properties, wherein: controlled variations in surface impedance are defined on at least one of the electrode coatings in selected zones (16) thereof; and a variable frequency excitation electrical voltage is applied between the electrodes (14, 15) provided on respective ones of said plates (11, 12), and voltage being selected to be suitable for producing alternately an electric field extending normally to the electrodes and an electric field which slopes relative to the normal to said electrodes at said zones (16) having a controlled impedance variation.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: October 4, 1988
    Assignee: Centre National de la Recherche Scientifique (CNRS)
    Inventors: Claude Germain, Marguerite Boix, Georges E. A. Durand, Philippe Martinot-Lagarde, Mohamed Monkade