Patents Examined by James C. Housael
  • Apparatus for printing and for forming a hologram on sheet material
    Patent number: 5003915
    Abstract: A technique and apparatus for printing that includes the formation of a hologram, or other type of diffraction pattern, directly on a desired end product of paper, or other sheet material. The hologram, or other diffraction pattern, is formed by casting a surface relief pattern directly onto the sheet material in a limited area.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: April 2, 1991
    Assignee: American Bank Note Holographics, Inc.
    Inventors: Salvatore F. D'Amato, Peter Sorbo, Richard E. Dunning