Patents by Inventor Karlheinz Matthay

Karlheinz Matthay 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).

  • Color scale palette
    Patent number: 4541801
    Abstract: A color scale palette has color sample rods tinted all along their lengths from a stem in a frame to the other end projecting from the frame. The frame has a window for exposing a portion of the color sample rods and, for example, a color key, and studs cooperative with a bore through the stem end of each color sample rod for snapping it into the frame. The bore is preferably a funnel-shaped for shadow-free as well as juxtaposed color comparisons.
    Type: Grant
    Filed: April 13, 1984
    Date of Patent: September 17, 1985
    Assignee: Kulzer & Co. GmbH
    Inventors: Wilhelm Mackert, Karlheinz Matthay