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. 05, 2019
Filed:
May. 06, 2014
Leonhard Kurz Stiftung & Co. KG, Furth, DE;
Ovd Kinegram Ag, Zug, CH;
Ludwig Brehm, Adelsdorf, DE;
Sebastian Mader, Lucerne, CH;
Andreas Schilling, Hagendorn, CH;
Wayne Robert Tompkin, Baden, CH;
Harald Walter, Horgen, CH;
Leonhard Kurz Stiftung & Co. KG, Furth, DE;
OVD Kinegram AG, Zug, DE;
Abstract
An optically variable element has first and second diffraction gratings which are high-frequency and therefore act reflectively into the zero diffraction order. Either a first color is generated by the first diffraction grating at a particular angle of rotation and a particular angle of illumination and simultaneously a second color, different from the first color, is generated by the second diffraction grating or a visible color is generated essentially only by the first diffraction grating at a first angle of rotation and a visible color is generated essentially only by the second diffraction grating at a second angle of rotation.