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USPTO March 2014 Update to Guidance & Training for Evaluating Utility Patent Subject Matter Eligibility for Claims involving Nature, Natural Phenomena, & Natural Products http://blogs.mvalaw.com/litigation-law-blog/uspto-march-2014-update-to-guidance-training-for-evaluating-utility-patent-subject-matter-eligibility-for-claims-involving-nature-natural-phenomena-natural-products/