Patents Assigned to 3dcd, L.L.C.
  • Optical data storage disc
    Patent number: 6160789
    Abstract: An optical data storage disc having a first component disc formed over one side with a pattern of indentations defining digital data, the indented side of the first component disc being provided with a reflective coating, and a second component disc being bonded to the indented side of the first component disc. The second component disc carries a surface relief pattern having continuous variations in depth over a range of depths, and defining a holographic, or other optically variable, image.
    Type: Grant
    Filed: October 26, 1998
    Date of Patent: December 12, 2000
    Assignee: 3dcd, L.L.C.
    Inventor: Nigel Christopher Abraham
  • Optical data storage disc with a visible holographic image and method for its manufacture
    Patent number: 6011767
    Abstract: An optical data storage disc (e.g. a compact disc) carries a digital recording and also carries a holographic image. The holographic recording occupies an area separate from the area occupied by the digital recording, for example the holographic recording may be positioned in an annular area encircling the central area occupied by the digital recording.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 4, 2000
    Assignee: 3dcd, L.L.C.
    Inventor: Nigel Christopher Abraham