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:
Apr. 17, 2012
Filed:
Apr. 17, 2007
Jayprakash C. Bhatt, Corvallis, OR (US);
Matthew Thornberry, Corvallis, OR (US);
Tienteh Chen, San Diego, CA (US);
Erick B. Kinas, Camas, WA (US);
Jayprakash C. Bhatt, Corvallis, OR (US);
Matthew Thornberry, Corvallis, OR (US);
Tienteh Chen, San Diego, CA (US);
Erick B. Kinas, Camas, WA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A method of security printing can comprise the steps of printing a transparent ink onto a portion of a coated substrate resulting in printed region and an unprinted region, where the transparent ink is devoid of dyes, pigments, ceramics, metallics, and fluorescents; illuminating both the printed region and the unprinted region of the substrate, where the printed region scatters more light than the unprinted region creating a contrast; and detecting the contrast with a sensor that is sensitive to detecting light scattering differences between the printed region and the unprinted region.