WAYNE, Pa.--(BUSINESS WIRE)--PharmaStem Therapeutics, Inc. announced today that the United States Patent and Trademark Office has issued a ruling confirming the validity of PharmaStem Therapeutics, Inc.'s pioneering patent about the Isolation and Preservation of Fetal and Neonatal Hematopoietic Stem and Progenitor Cells of the Blood and Methods of Therapeutic Use.
