Background
Carnegie Mellon University (CMU) held two patents covering algorithms for improving the accuracy of reading magnetically stored data from hard drives — specifically, a method for more precisely detecting whether each bit stored on the disk is a 0 or a 1, even when the magnetic signal is weak or noisy. These algorithms, known as Viterbi-based detectors optimized for magnetic recording channels, were fundamental to achieving higher storage densities in hard drives. CMU licensed the patents widely in the industry.
Marvell Technology Group — a major semiconductor company that supplied hard drive controller chips to virtually all major hard drive manufacturers including Western Digital, Seagate, and Hitachi — had incorporated a functionally equivalent algorithm into its chips without licensing CMU’s patents. After discovery revealed that Marvell had long been aware of CMU’s patents and had nonetheless copied the algorithms, a Western District of Pennsylvania jury found willful infringement and awarded approximately $1.17 billion in reasonable royalty damages — at $0.50 per chip — which the court enhanced by 23% for willfulness, yielding a total of approximately $1.5 billion.
The Court’s Holding
The Federal Circuit largely affirmed. On infringement and validity, the court found the jury’s verdict supported by substantial evidence. On willfulness, the court upheld the finding: Marvell had been aware of CMU’s patents, knew its products practiced the claimed algorithms, and proceeded without a good-faith belief of non-infringement or invalidity. On damages, the court affirmed the $0.50-per-chip royalty rate as within the range supported by the Georgia-Pacific hypothetical negotiation analysis.
However, the Federal Circuit vacated the portion of the damages award attributable to chips sold and used outside the United States. Under the territoriality principle of U.S. patent law, domestic patent rights do not cover foreign activity. The court identified two categories of foreign-chips damages: chips tested in the United States (potentially covered) and chips made, sold, and used entirely abroad (not covered). The case was remanded for the district court to properly apportion the damages base between domestic and foreign activities.
Key Takeaways
- University-owned patents on fundamental signal processing algorithms can support enormous royalty damages when the patented algorithms are incorporated into billions of commercial chips across a major technology market.
- Willful infringement — particularly when a defendant copies patented technology while aware of the patents and without establishing a good-faith defense — can support enhancement of the base damages award under § 284.
- U.S. patent damages are territorially limited: the royalty base cannot include foreign sales of products made, sold, and used entirely abroad, even if the infringing technology was developed or tested in the United States.
- The “use” of a chip in the United States — such as testing or qualification — can provide a basis for domestic infringement liability and inclusion in the royalty base, even if the chip is ultimately deployed in foreign hard drives.
Why It Matters
Carnegie Mellon v. Marvell was one of the largest patent verdicts in history, illustrating the enormous damages exposure that can accumulate when a fundamental technology patent is infringed across billions of units over many years. The case reinforced that university research institutions — which developed much of the algorithmic science underlying modern data storage — hold patent rights with enormous commercial value.
The territoriality holding on foreign damages also had significant implications for global semiconductor companies that design chips in the United States but manufacture and sell them primarily abroad. The Federal Circuit’s ruling that purely foreign sales fall outside U.S. patent liability — while domestic testing may create a hook for U.S. jurisdiction — required companies to carefully track where each stage of their chip design, testing, and commercial activity occurs. Ultimately, CMU and Marvell settled the case for approximately $750 million, making it one of the largest patent settlements on record.