Tesla, Inc. v. Intellectual Ventures II LLC — PTAB Cancels All Claims of 3G Power-Control Patent

Background

Intellectual Ventures II LLC — one of the largest patent holding companies in the world — asserted U.S. Patent No. 11,664,889 B2 against Tesla in three district court lawsuits filed in the Western District of Texas in April 2024. The ‘889 patent, which traces its priority to December 2006, covers a method and apparatus for closed-loop uplink power control in TD-CDMA (Time Division–Code Division Multiple Access) cellular networks. In plain English: the patent describes how a 3G wireless base station sends power-control commands to mobile devices on a shared control channel, and how those devices then transmit an uplink beacon signal at the commanded power level even when they have no data to send.

Tesla filed a petition for inter partes review (IPR) — a PTAB proceeding in which a party can challenge a granted patent’s validity based on prior art — in November 2024. PTAB instituted review in July 2025, setting up a trial that included a combined oral hearing in June 2026 for IPR2025-00221 and a related proceeding. Administrative Patent Judge Scott Daniels authored the Final Written Decision, joined by APJs Droesch and Laney.

The Board’s Decision

PTAB found all eight challenged claims — claims 1 through 8 — unpatentable as obvious under 35 U.S.C. § 103(a):

• Claims 1, 2, 5, 6: Obvious over Dateki alone (U.S. Patent No. 8,072,916, a W-CDMA/HSDPA patent describing shared downlink power control channels).
• Claims 3 and 7: Obvious over Dateki in combination with Mate (U.S. Patent Application Publication No. 2002/0141331).
• Claims 4 and 8: Obvious over Dateki combined with Chitrapu (the textbook Wideband TDD-WCDMA for the Unpaired Spectrum, Wiley 2004), which taught the time-synchronization-dependent channel-switching aspect of those dependent claims.

Intellectual Ventures argued that Dateki taught away from the ‘889 patent’s approach and that combining the references would require undue experimentation. The Board rejected both arguments, finding that a person of ordinary skill in the art (POSITA) would have been motivated to adapt the Dateki power-control scheme to the TD-CDMA context claimed in the ‘889 patent, and that the combination produced predictable results using known elements. Intellectual Ventures did not submit evidence of secondary considerations — such as commercial success, long-felt need, or industry praise — that might have rebutted the obviousness case.

Key Takeaways

• Complete invalidation. All eight claims were cancelled. No dependent claims survived. Unless Intellectual Ventures appeals to the Federal Circuit, the ‘889 patent is dead.
• Prior art overlap matters. The result turned on the Board’s conclusion that Dateki’s W-CDMA power-control architecture and the ‘889 patent’s TD-CDMA architecture were close enough that combining them was obvious to a skilled engineer — there was no fundamental incompatibility.
• Secondary considerations not presented. By not offering evidence of commercial success or long-felt need, Intellectual Ventures lost an avenue that might have created a genuine factual dispute about obviousness.
• Parallel district court cases affected. The three pending Western District of Texas infringement cases against Tesla will now face a significant validity challenge obstacle, and are likely to be stayed or dismissed.

Why It Matters

This decision is part of a broader battle over 3G/4G standards-essential patents (SEPs) asserted by patent holding companies. Intellectual Ventures has historically acquired large portfolios of telecommunications patents and licensed them aggressively to device manufacturers and network operators. A full cancellation of the ‘889 patent eliminates one assertion vehicle and may affect related patents in IV’s portfolio that share similar specifications.

For Tesla specifically, the win removes a damages exposure that, depending on how many devices and how many years of alleged infringement IV was targeting, could have been significant. More broadly, the decision underscores that PTAB’s inter partes review remains a powerful and cost-effective tool for challenging patents asserted by non-practicing entities (NPEs): of the four related IV patents whose PTAB trials concluded in this same batch, at least one saw complete claim cancellation and at least one saw the Board determine no claims were unpatentable, reflecting the fact-specific, claim-by-claim nature of the IPR process.