Patents by Inventor Petrus J. Van Der Walt

Petrus J. Van Der Walt 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: 5119234
    Abstract: A method and apparatus for the provision of stereoscopic three-dimensional images applicable in visual representations such as photographs, paintings, pictures and other patterns or diagrams on a surface which could be produced by other means; to kinematic images which might, for example, be employed in a cinema; to projected still images; to advertisements in these mediums; to book illustrations and decorations such, for example, as murals, and upholstered curtains. This invention provides a swopping over or reversal of positions of two stereoscopic images as compared to the presentation of stereoscopic images which has been heretofore employed. This presentation permits a viewer to see a three-dimensional image without any optical aids being necessary, merely by "squinting" the eyes slightly.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: June 2, 1992
    Inventor: Petrus J. Van Der Walt