Patents Assigned to Foundation Korea Campus Crusade for Christ
  • Roll-type learning aid apparatus for reading and memorizing
    Patent number: 4583951
    Abstract: A roll-type apparatus as a learning aid for reading and memorizing, the apparatus including a case provided with a display window therein, a word-listed paper ribbon wound about a pair of roll-shafts, forward and backward knobs interlocked with the roll-shafts by pinions, and guide rods for maintaining the ribbon under tension and in alignment with the display window during travel between the roll-shafts.
    Type: Grant
    Filed: June 11, 1985
    Date of Patent: April 22, 1986
    Assignee: Foundation Korea Campus Crusade for Christ
    Inventor: Choi Y. Soo