The 2005 Patent Reform Bill might perhaps bring most dramatic changes to the U.S. patent system including a change from the first-to-invent doctrine to the first-to-file doctrine already adopted by the rest of the world, cf. also this opinion here. Also the introduction of a post-grant Opposition procedure into U.S. patent law is discussed. A review period of nine to 12 months would let the patent office, instead of the courts, address complaints converning the validity of a patent.