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:
Sep. 17, 2019
Filed:
May. 01, 2017
Yingqiu Jiang, Sunnyvale, CA (US);
Aharon Hochbaum, Berkeley, CA (US);
Yingqiu Jiang, Sunnyvale, CA (US);
Aharon Hochbaum, Berkeley, CA (US);
Other;
Abstract
Disclosed herein is a transmissive or reflective optical security device, containing a hidden image, that is based on patterned retardation in a single layer of a nematic liquid crystal polymer on a substrate and methods of fabricating said hidden image by selectively modifying the retardation value. Fabrication methods that are compatible with high throughput standard roll-to-roll or printing lines are disclosed. Said image becomes visible under polarized illumination. The hidden image feature enhances the counterfeiting resistance of the security device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile