US Patents
Approved
Sushil Jajodia, Huiping Guo, Yingjiu Li: Method and Apparatus for Watermarking Stream Data. United States Patent 20060277410 (http://www.freepatentsonline.com/y2006/0277410.html). Status: approved in May 2010.
Sushil Jajodia, Huiping Guo, Yingjiu Li: Fragile Watermarks. United States Patent 20060095775 (http://www.freepatentsonline.com/y2006/0095775.html). Status: approved in June 2010.
Last updated: Jan 2012.