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:
Nov. 11, 2003
Filed:
Oct. 28, 1998
Ronald D. Stephens, Jr., Escondido, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A document printing and verification system and method. The system includes a printing apparatus for printing an image on a print medium, and an inkjet printer apparatus for printing an invisible identification pattern such as a barcode on the print medium which is invisible to the naked eye under normal ambient illumination. A scanner apparatus is positioned for producing an image of the identification image for verification use. The scanner apparatus includes a light source for illuminating an imaging zone with light including nonvisible energy components and a camera sensitive to nonvisible light from the print medium to form an image of the nonvisible identification image. The inkjet printhead is a high resolution printhead adapted to provide inkjet barcode printing resolution at least as high as 600 dots per inch, improving edge acuity of the pattern, and permits very high density information to be imprinted on the document page. The inkjet ink includes a UV dye and an FR/IR dye. The UV dye when illuminated with UV light provides an image of the barcode which is visible to the naked eye. The FR/IR dye is imaged using an FR/IR camera to capture electronically an image of the barcode.