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:
Feb. 21, 1989
Filed:
Sep. 19, 1986
David G Gold, Santa Monica, CA (US);
Frank D Tucker, Valencia, CA (US);
Light Signatures, Inc., Los Angeles, CA (US);
Abstract
A system for authenticating an object on the basis of a repeatably sensible, random magnetic medium or substance deposited on an object, for example in the form of a document. A magnetic medium printed on the document is sensed for its random characteristic which is reduced to a data format that is recorded on the object, e.g. document. Specifically, the repeatably sensible, random characteristic of the magnetic medium is recorded in a digital format on a magnetic stripe of a document so as to identify or verify the document. Conditioning techniques, as depositing and recording the magnetic characteristic medium and selectively sensing it, accomplish various specific objectives.