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:
Jan. 29, 2008
Filed:
Aug. 14, 2002
Harald Walter, Erlangen, DE;
Georg Bauer, Nuremberg, DE;
Ralph Domnick, Buckenhof, DE;
Abstract
The invention relates to forgery-proof marking for objects, such as check cards, banknotes, labels, and the like, comprising a plastic transparent film () having a first and second surface, whereby a series of layers is applied to the second surface. When viewed from the first surface, the color of this series of layers changes according to the viewing angle, and the series of layers is formed from an absorber layer provided on the second surface, from a spacer layer () overlying the absorber layer, and from a mirror layer () overlying the spacer layer (). In order to improve the machine identification of the authenticity of the marking, the invention provides that the absorber layer is comprised of metallic clusters ().