Background
VLSI Technology LLC sued Intel Corp. for patent infringement in district court, and Intel responded by filing inter partes review (IPR) petitions at the Patent Trial and Appeal Board challenging the validity of VLSI’s patents. The district court and the PTAB were thus handling the same patents at the same time — a common scenario in modern patent disputes.
During the PTAB proceedings, the Board adopted claim constructions that differed from those the district court had entered in the concurrent litigation. Intel argued that the Board had correctly construed the claims; VLSI contended that the Board was bound by or should have deferred to the district court’s constructions. The Board ruled in Intel’s favor on validity, and VLSI appealed.
The Court’s Holding
The Federal Circuit affirmed, holding that the PTAB is not bound by claim constructions adopted in concurrent district court litigation. The two forums are legally independent proceedings, each tasked with determining claim scope under the same Phillips standard — the ordinary and customary meaning a person of ordinary skill in the art would give to the claim terms as of the patent’s effective filing date. The fact that a district court has already construed the same claims does not obligate or even require the Board to adopt those constructions.
The court emphasized that the Board must conduct its own independent claim construction analysis based on the intrinsic record (claims, specification, and prosecution history) and the arguments presented in the IPR proceeding. Different records, different arguments, and different evidentiary presentations can legitimately lead to different constructions without either forum being wrong. The Federal Circuit found the Board’s constructions in this case well-supported and upheld the invalidity findings.
Key Takeaways
- The PTAB is not bound by district court claim constructions, even when the same patents are being litigated simultaneously in federal court under the same Phillips standard.
- Parallel proceedings — IPR at the PTAB and infringement suits in district court — can produce different claim constructions without either being erroneous, creating strategic complexity for both sides.
- Parties conducting parallel IPR and district court proceedings should develop claim construction positions tailored to each forum and not assume that success in one will automatically translate to the other.
- Patent owners facing IPR while simultaneously litigating infringement must be prepared to defend claim constructions in two independent settings, each with its own record and procedural rules.
Why It Matters
The VLSI v. Intel decision crystallizes a strategic reality of modern patent disputes: when a patent is challenged via IPR at the same time it is being litigated in district court, the two proceedings can diverge on fundamental questions like what the claims actually mean. This can lead to situations where a patent survives IPR (under one construction) but is found non-infringed in district court (under a different construction) — or vice versa.
For technology companies involved in high-stakes patent battles — and VLSI v. Intel was one of the highest-stakes patent cases in history, involving billion-dollar jury verdicts in district court — this ruling underscores the importance of coordinating claim construction strategy across forums. Defendants using IPR as a parallel validity challenge cannot assume the Board will follow the district court’s lead. Patent owners must be equally prepared to defend their preferred constructions in both venues simultaneously, often with different legal teams and under different procedural constraints.