Patent ID: 8556266

Claim:
A dot pattern printed medium comprising: a first medium, on at least one surface of which is provided a first dot pattern, in which a coordinate value or a code value is patterned in accordance with a predetermined algorithm; a second medium which is detachably attached to the first medium and provided with a second dot pattern, in which a coordinate value or a code value which is different from the coordinate value or the code value patterned in the first dot pattern is patterned in accordance with in a predetermined algorithm in a region overlapping with a region where the first dot pattern is provided; and a third medium which is detachably attached to the first medium and the second medium and provided with a third dot pattern, in which a coordinate value or a code value which is different from the coordinate values or the code values patterned in the first dot pattern and the second dot pattern is patterned in accordance with a predetermined algorithm in a region overlapping with a region where the first dot pattern is provided and a region where the second dot pattern is provided, wherein the second medium is a sticker, and the second dot pattern or the third dot pattern is formed on at least part of the sticker, and the sticker is attached to a card along the edge of the card in a manner such that the sticker is foldable in both front and back surface directions of the card.