But as the number of Western yoga teachers has grown, there has been a steady increase in patent applications claiming each pose in their class is not part of the ancient discipline of mind and body, but their own unique invention. In the United States alone, there have been more than 130 yoga-related patents, 150 copyrights and 2,300 trademarks. Now India's Traditional Knowledge Digital Library is being made available to patents offices throughout the world so they can establish whether the claim is a genuine innovation or "prior art" from Indian systems of medicine.