On July 30, 2015, the Ninth Circuit issued one of the most significant appellate opinions regarding standard essential patents (SEPs) subject to commitments to license on fair, reasonable and non-discriminatory (FRAND, or simply RAND) terms. In Microsoft Corp. v. Motorola, Inc. (Case No. 14-35393), the Court upheld determinations by U.S. District Court Judge James Robart (W.D. Wash.) as to (i) when a member of a Standard Setting Organization (SSO) is obligated to license that member’s SEP on FRAND terms, (ii) what the proper methodology is for calculating a FRAND royalty rate, and (iii) what remedies are available for breach of an obligation to license a SEP on FRAND terms. The affirmance represents a major victory for Microsoft and other SEP licensees, and provides significant guidance regarding future FRAND disputes.