Patents Assigned to DCARD, Inc.
  • Magnetic data storage card
    Patent number: 6307709
    Abstract: The magnetic data-storage card includes a magnetic data-storage medium layer adhering to the card. The data-storage medium layer includes a plurality of data storage tracks for storing data therein. Each of the tracks having at least an arc-segment wherein each of the data storage tracks being substantially parallel to a neighboring track.
    Type: Grant
    Filed: April 9, 1999
    Date of Patent: October 23, 2001
    Assignee: Dcard, Inc.
    Inventors: Jeffrey F. Liu, Francis K. King