Patents Assigned to 3-D Dan, Inc.
  • Passive, reusable device for amusement or for warning
    Patent number: 4886687
    Abstract: A passive, reusable visual amusement or warning device includes a handle and a number of light diffracting strips bearing an embossed holographically generated diffraction pattern. The diffraction pattern in the foil is produced in a planar format, and the strips bearing the pattern are displayed and viewed in a curved format. Ambient light striking the strips is diffracted to produce a dynamic, kaleidoscopic readily noticed display of brilliant colors.
    Type: Grant
    Filed: November 22, 1988
    Date of Patent: December 12, 1989
    Assignee: 3-D Dan, Inc.
    Inventor: Michael W. Malott