Patents by Inventor Bernhard Pirkl

Bernhard Pirkl 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).

  • Liquid crystal indicator, preferably for motor vehicles
    Patent number: 5063379
    Abstract: A display device for measured values, function, status and trouble indications and the like comprising at least one liquid crystal cell having areas with different coloration of the indications, a light guide extending along at least one of these areas at the back side of the liquid crystal cell for enabling different coloration of the one area and a light source arranged at an end area of the light guide for illuminating the liquid crystal cell.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: November 5, 1991
    Assignee: Robert Bosch GmbH
    Inventors: Ehrenfried Fabry, Georg Goddard, Dieter Meyer, Hans Petermann, Bernhard Pirkl, Werner Wiedemann