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:
Aug. 25, 2020
Filed:
Jun. 13, 2018
Nthdegree Technologies Worldwide Inc., Tempe, AZ (US);
Steven B. Roach, Gilbert, AZ (US);
Richard A. Blanchard, Los Altos, CA (US);
Eric Kahrs, Phoenix, AZ (US);
Larry Todd Biggs, Queen Creek, AZ (US);
Chye Kiat Ang, Singapore, SG;
Mark D. Lowenthal, Vancouver, WA (US);
William J. Ray, Fountain Hills, AZ (US);
NTHDEGREE TECHNOLOGIES WORLDWIDE INC., Tempe, AZ (US);
Abstract
In one embodiment, a printed security mark comprises a random arrangement of printed LEDs and a wavelength conversion layer. During fabrication of the mark, the LEDs are energized, and the resulting dot pattern is converted into a unique digital first code and stored in a database. The emitted spectrum vs. intensity and persistence of the wavelength conversion layer is also encoded in the first code. The mark may be on a credit card, casino chip, banknote, passport, etc. to be authenticated. For authenticating the mark, the LEDs are energized and the dot pattern, spectrum vs. intensity, and persistence are converted into a code and compared to the first code stored in the database. If there is a match, the mark is authenticated.