

Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Mediasec Technologies LLC, Fraunhofer CRCG Inc filed Critical Mediasec Technologies LLC Assigned to MEDIASEC TECHNOLOGIES LLC reassignment MEDIASEC TECHNOLOGIES LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Original Assignee Mediasec Technologies LLC Fraunhofer CRCG Inc Priority date (The priority date is an assumption and is not a legal conclusion.

Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Inventor Jian Zhao Eckhard Koch Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US09/070,524 Other languages English ( en) Google Patents Digital authentication with analog documentsĭownload PDF Info Publication number US6243480B1 US6243480B1 US09/070,524 US7052498A US6243480B1 US 6243480 B1 US6243480 B1 US 6243480B1 US 7052498 A US7052498 A US 7052498A US 6243480 B1 US6243480 B1 US 6243480B1 Authority US United States Prior art keywords authentication information information set forth analog form watermark Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6243480B1 - Digital authentication with analog documents US6243480B1 - Digital authentication with analog documents
