After a patent is granted, the patent can still be invalidated if evidence the invention was obvious is discovered. Any member of the public can institute an Inter Partes Review of a patent based on sections 35 U.S.C. § 102 (novelty requirement) and 35 U.S.C. § 103 (nonobviousness requirement). An Inter Partes Review is a trial proceeding conducted at the Patent Trial and Appeal Board to review the patentability of one or more claims of an issued patent. The Patent Trial and Appeal Board can accept new prior art from the public and modify or cancel a patent based on that prior art.