On August 16, 2012, the Federal Circuit reaffirmed Myriad's right to patent the genes although they denied rights to patent comparisons of DNA sequences. On November 30, 2012, the Supreme Court agreed to hear a second challenge to the two gene patents held by Myriad. Oral argument took place on April 15, 2013. On June 13, 2013, in Association for Molecular Pathology v. Myriad Genetics (No. 12-398), the US Supreme Court unanimously ruled that "A naturally occurring DNA segment is a product of nature and not patent eligible merely because it has been isolated", invalidating Myriad's patents on the BRCA1 and BRCA2 genes. However, the Court also held that manipulation of a gene to create something not found in naturesuch as a strand of synthetically-produced complementary DNA (cDNA)could still be eligible for patent protection.