FDAnews
www.fdanews.com/articles/101223-u-s-patent-office-reissues-patent-for-diagnosis-of-chronic-congestive-heart-failure

U.S. Patent Office Reissues Patent for Diagnosis of Chronic Congestive Heart Failure

November 19, 2007

Nanogen, Inc., developer of advanced diagnostic products, announced that it has been granted U.S. Patent No. RE39,816, which is a reissue of United States Patent No. 6,461,828, titled “Conjunctive Analysis of Biological Marker Expression For Predicting Cardiac Mortality.”
Yahoo! Finance