Patents by Inventor Werner Preuss

Werner Preuss 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).

  • Illuminated outdoor advertising installation
    Patent number: 4989126
    Abstract: To produce outdoor advertising installations which are equipped to be illuminated and have different areas appearing, respectively, dark and light by daylight, with the brightness of the different areas being reversed by night under the influence of artificial light acting from the back, areas which appear bright by daylight on the outermost plate (information plate) are back printed with a bright covering and behind that with a dark covering and areas which appear dark by daylight are back printed dark with a regular pattern of lines or points.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: January 29, 1991
    Assignee: Agfa-Gevaert Aktiengessellschaft
    Inventor: Werner Preuss