Patents by Inventor Derek William Ball

Derek William Ball 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: 4057921
    Abstract: A decorative device for displaying overlapping colors both in a static symmetrical configuration and in a kinetic, random and constantly changing pattern. It takes advantage of shades obtainable when a transparent or translucent layer of one color overlaps another. The device consists of at least two sheet-like chambers in face to face relationship. In each chamber there are at least two immiscible fluid phases of different specific gravities each of a different color although optionally including a colorless phase. Preferably there are two chambers of two phases each, one phase being colorless and the other three phases being colored the three primary colors.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: November 15, 1977
    Inventor: Derek William Ball