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:
May. 05, 2026
Filed:
Mar. 07, 2023
Echomark, Inc., Kirkland, WA (US);
Sanjay Krishnan, Hinsdale, IL (US);
David Wong, Los Gatos, CA (US);
Chad Voss, Seattle, WA (US);
Troy Batterberry, Kirkland, WA (US);
Clayton Huthwaite, Chesterfield, VA (US);
Colin Saunders, San Francisco, CA (US);
Stephen Bianamara, Seattle, WA (US);
Parker Beck, Kenmore, WA (US);
EchoMark, Inc., Kirkland, WA (US);
Abstract
Document source detection uses unique copies to identify sources of leaked documents. The unique copies are generated from an original document and include a unique watermarking of one or more perturbations to a feature of the original document. An artifact, such as a photo or copy, is derived from one of the unique copies, the unique copy from which it was derived is identified. To identify the unique copy, unique copy keypoints in the unique copies are matched to artifact keypoints in the artifact to align the artifact with a location within the unique documents. Pixel regions in the unique copies that include perturbations are used to identify corresponding pixel regions in the artifact. Pixels in these regions are compared to identify the unique copy from which the artifact was derived, thus identifying a possible source of the leaked document.