Patents by Inventor Joachim Ruger

Joachim Ruger 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).

  • Supertwist liquid-crystal display
    Patent number: 5308538
    Abstract: Supertwist liquid-crystal displays having excellent properties are obtained using a nematic liquid-crystal mixture based on component A which contains one or more compounds of the formula IIa or IIb: ##STR1## on or more compounds of the formulae IIc to IIe: ##STR2## and one or more compounds of the formula IIf to IIh: and one or more compounds of the formula IIf to IIh: ##STR3## wherein R, R.sup.1, R.sup.2, L, Y, X and n are as defined herein.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: May 3, 1994
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Georg Weber, Joachim Ruger, Klaus-Peter Stahl, Martina Schmidt, Detlef Pauluth, Michael Romer