The United States has signed and implemented the Berne Convention and the WIPO Copyright Treaty.USA is a party to the Berne Convention  and the Paris Act since March 1, 1989. USA ratified the WIPO Copyright Treaty and the WIPO Performances and Phonograms Treaty on September 14, 1999.As a member of the WTO, USA is also a party to the TRIPS Agreement.  USA notified certain derogations under the WPPT, see: http://www.wipo.int/treaties/en/notifications/wppt/treaty_wppt_8.html 