EFFECTIVE DATES.

SEC. 335. EFFECTIVE DATES. (a) In General.— Subject to subsections (b) and (c), the amendments made by this subtitle take effect on the date the Agreement enters into force with respect to the United States. (b) Section 331.— The amendments made by section 331 shall apply to all patent applications that are filed on or after the date of the enactment of this Act: Provided, That an applicant for a patent, or a patentee, may not establish a date of invention by reference to knowledge or use thereof, or other activity with respect thereto, in a NAFTA country, except as provided in sections 119 and 365 of title 35, United States Code, that is earlier than the date of the enactment of this Act. (c) Section 333.— The amendments made by section 333 shall apply only to trademark applications filed on or after the date of the enactment of this Act.