Exhibit 4.8 ASSIGNMENT AGREEMENT BETWEEN DR. LELAND SHAPIRO AND CAVIT SCIENCES, INC. WHEREAS, LELAND SHAPIRO, residing at [+++++++++++], an individual, (hereinafter referred as "ASSIGNOR") has invented a certain invention entitled "METHODS AND...Assignment Agreement • August 18th, 2006 • Cavit Sciences, Inc. • Pharmaceutical preparations • Colorado
