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In a patent infringement action involving the international distribution of Microsoft's Windows software, the United States Court of Appeals for the Federal Circuit has interpreted 35 U.S.C. § 271(f) as extending infringement liability to foreign computers assembled with copies of software replicated abroad from a US-made master version. In Eolas Techs., Inc. v. Microsoft Corp. AT&T Corp. v. Microsoft Corp., the CAFC determined that the exportation of software code may constitute patent infringement under 271(f) if the software is deemed to be a "component of a patented invention." But it is clear that U.S, patent laws have not of what extraterritorial conduct invokes, and what conduct does not invoke, the U.S. patent infringement status. However, it is noted that the owners of U.S. patents are increasingly attempting to enforce their U.S. patents against activities carried out at least in part, if not entirely, outside the U.S.