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. 27, 2001
Filed:
Feb. 14, 2000
Thomas A. Berson, Palo Alto, CA (US);
Thomas M. Breuel, Brisbane, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A system and method for tagging sheets of recording material, so that the origin of the sheets and the authenticity of the sheets may be determined, includes a roller that applies at least a portion of the random pattern to the document. The random pattern is applied by imprinting, embossing, or by piercing the sheet. The pattern applied to the sheet can be determined by any known forensic technique and the pattern can be imaged and stored in a database. A series of rollers may apply phase shifted random patterns to one side or both sides of the sheet. The phase shift of the random patterns may be determined to establish a sequence code. The roller or rollers including the random patterns may be installed in an image forming apparatus, preferably in a sheet transport mechanism of the image forming apparatus.