One-Fifth of Human Genes Have Been Patented, Study Reveals Stefan Lovgren for National Geographic News October 13, 2005 A new study shows that 20 percent of human genes have been patented in the United States, primarily by private firms and universities. The study, which is reported this week in the journal Science, is the first time that a detailed map has been created to match patents to specific physical locations on the human genome. Researchers can patent genes because they are potentially valuable research tools, useful in diagnostic tests or to discover and produce new drugs. "It might come as...