CARD-TYPE INFORMATION STORING MEDIUM, MANUFACTURING METHOD THEREFOR, AND READING DEVICE THEREFOR

PROBLEM TO BE SOLVED: To provide a card-type information storing medium which shows outstanding information concealing properties and extreme duplication difficulty as well as a manufacturing method therefor and a reading device for the card- type information storing medium. SOLUTION: This card-type...

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Main Authors MIWA TADAHITO, SHIMAZAKI SATOSHI, NISHIZUMI HIROSHI
Format Patent
LanguageEnglish
Published 28.08.2002
Edition7
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Abstract PROBLEM TO BE SOLVED: To provide a card-type information storing medium which shows outstanding information concealing properties and extreme duplication difficulty as well as a manufacturing method therefor and a reading device for the card- type information storing medium. SOLUTION: This card-type information storing medium has an information storing part 2 which stores information depending upon the presence of a colored part 5 and also an information storing layer 4 covering the surface of a card ground 1a. In addition, the color of the colored part 5 is almost the same as the color applied to at least a part of the surface of the card ground 1a.
AbstractList PROBLEM TO BE SOLVED: To provide a card-type information storing medium which shows outstanding information concealing properties and extreme duplication difficulty as well as a manufacturing method therefor and a reading device for the card- type information storing medium. SOLUTION: This card-type information storing medium has an information storing part 2 which stores information depending upon the presence of a colored part 5 and also an information storing layer 4 covering the surface of a card ground 1a. In addition, the color of the colored part 5 is almost the same as the color applied to at least a part of the surface of the card ground 1a.
Author SHIMAZAKI SATOSHI
MIWA TADAHITO
NISHIZUMI HIROSHI
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Snippet PROBLEM TO BE SOLVED: To provide a card-type information storing medium which shows outstanding information concealing properties and extreme duplication...
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Title CARD-TYPE INFORMATION STORING MEDIUM, MANUFACTURING METHOD THEREFOR, AND READING DEVICE THEREFOR
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