The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 1993
Filed:
Oct. 26, 1990
Kenzou Yoshihara, Kounosu, JP;
Nippon Conlux Co., Ltd., Tokyo, JP;
Abstract
This card type recording medium has plural types of inks which normally exhibit the same color visually but exhibit different optical characteristics under a predetermined condition provided in blocks in a desired pattern and, by breaking the blocks block by block in accordance with the used amount or other factor, is capable of recording information corresponding to the breakage state of the blocks. First information can be recorded by a pattern of arrangement of these plural types of inks and second information can be recorded in accordance with the breakage state of the blocks. The first information is a collation pattern which indicates that the card type recording medium is a genuine one. Since the plural types of inks exhibit the same color visually, it cannot be visually discerned which type of ink is used on which block, which makes it difficult to counterfeit the card by imitating this collation pattern. Besides, since the ink arrangement pattern cannot be visually discerned, it is difficult to repair punched holes of broken blocks by using the ink used in forming this ink arrangement pattern so that false alteration of the second information can be prevented.