Patents by Inventor Frederick E. Hart

Frederick E. Hart 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).

  • Decorative article
    Patent number: 4347270
    Abstract: A decorative article, and method, wherein a shaped mass of transparent material is embodied within a block of the same material so as to provide a shaped interface. Selected regions or areas of the interface are conditioned with light reflective material so as to render visible selected portions of the otherwise invisible interface, thereby achieving a three dimensional display having a shape controlled by the shaping of the interface but whose quality or artistic content is controlled by the conditioning of the interface.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: August 31, 1982
    Inventor: Frederick E. Hart