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:
Nov. 03, 1992
Filed:
Jan. 07, 1992
Applicant:
Inventor:
Yoshihiko Nakahara, Tokyo, JP;
Assignee:
Kyodo Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ; G06K / ;
U.S. Cl.
CPC ...
235449 ; 235494 ;
Abstract
A magnetic recording medium includes a truth determining code for determining whether the medium is authentic. The truth determining code is indicated by a magnetic polarity at at least an edge of the medium. A method of determining whether the medium is authentic comprises the steps of detecting a magnetic polarity at an edge of the magnetic recording medium, and collating a combination of the magnetic polarity with a proper combination of the magnetic polarity.