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:
Dec. 27, 2011
Filed:
Jul. 03, 2008
Young-min Kwak, Gardena, CA (US);
Chung-chieh Kuo, Taipei, TW;
Xu-hua Liu, Beijing, CN;
Ying-jieh Huang, Taipei County, TW;
Young-Min Kwak, Gardena, CA (US);
Chung-Chieh Kuo, Taipei, TW;
Xu-Hua Liu, Beijing, CN;
Ying-Jieh Huang, Taipei County, TW;
Primax Electronics Ltd., Neihu, Taipei, TW;
Abstract
A protection method for preventing a hard copy of a document from being released or reproduced is provided. The protection method comprises: selecting a pattern with a closed contour line and utilizing a level set method to process the pattern to generate at least a watermark; and embedding the watermark into the document. In addition, the protection method can further comprise: detecting the hard copy of the document to determine whether at least a watermark exists in the hard copy of the document; and forbidding releasing or reproducing the document when the watermark is detected in the hard copy of the document.