US Patent 11840112 Optical structures providing dichroic effects
Patent 11840112 was granted and assigned to WAVEFRONT TECHNOLOGY INC on December, 2023 by the United States Patent and Trademark Office.
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US Patent 11840112 Optical structures providing dichroic effects
Article
Patent abstract
A document, product, or package, such as a banknote, passport or the like comprises structures having dichroic effects that change color with viewing angle in both transmission and reflection. Such structures can be useful as security features that counter the ability to effectively use counterfeit documents, products, packages, etc.
Infobox
Is a
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Christopher Chapman Rich0
Joel Mikael Petersen0
Roger Winston Phillips0
Date of Patent
December 12, 2023
0Patent Application Number
174459960
Date Filed
August 26, 2021
0Patent Citations
Patent Primary Examiner
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