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http://www.aclu.org/free-speech-technology-and-liberty-womens-rights/association-molecular-pathology-v-myriad-genetics

The U.S. Patent and Trademark Office (PTO) has granted thousands of patents on human genes – in fact, about 20 percent of our genes are patented. A gene patent holder has the right to prevent anyone from studying, testing or even looking at a gene. As a result, scientific research and genetic testing has been delayed, limited or even shut down due to concerns about gene patents.