Microsoft Corp. v. AT&T Corp.

United States Supreme Court – 2007

“U.S. patent law does not automatically extend beyond U.S. borders.”

SHORT DESCRIPTION

Microsoft Corp. v. AT&T Corp. is a landmark U.S. Supreme Court decision addressing the extraterritorial reach of U.S. patent law. The case clarified whether software code supplied from the United States and replicated abroad could trigger liability under 35 U.S.C. § 271(f).

The ruling significantly impacted multinational technology companies and cross-border software distribution practices.

FACTS OF THE CASE

AT&T owned a patent covering speech compression technology used in computers. Microsoft developed the Windows operating system, which allegedly incorporated software capable of infringing AT&T’s patent.

Microsoft supplied master copies of Windows software from the United States to foreign manufacturers. Those manufacturers then replicated and installed the software onto computers abroad.

AT&T argued that Microsoft was liable under § 271(f), which imposes liability for supplying components of a patented invention from the United States for combination abroad.

Microsoft contended that software code, particularly when replicated overseas, does not constitute a “component” supplied from the United States within the meaning of the statute.

ISSUES INVOLVED

Whether software code qualifies as a “component” under § 271(f).

Whether copies made abroad from a master disk supplied in the U.S. trigger patent liability.

COURT’S FINDINGS AND OBSERVATIONS

The Supreme Court ruled in favor of Microsoft.

The Court held that abstract software code, without physical embodiment, is not a “component” under § 271(f). Furthermore, copies made abroad are not considered components supplied from the United States.

The Court emphasized the presumption against extraterritorial application of U.S. patent law. Patent rights are territorial in nature and do not automatically extend to foreign manufacturing or use.

This judgment reinforced the principle that Congress must clearly indicate if a statute is intended to apply beyond U.S. borders.

SUGGESTION / PRACTICAL TAKEAWAY

For global technology companies, this case provides clarity regarding international distribution structures. U.S. patent liability is limited in scope, particularly where replication and assembly occur outside the United States.

Strategic planning of supply chains and licensing structures remains crucial in cross-border IP management.

JUDGMENT

Year: 2007

The United States Supreme Court held that software copies made abroad do not trigger liability under § 271(f), reaffirming the territorial limits of U.S. patent law.