Tesla Inc. has petitioned the U.S. Supreme Court to decide whether the Patent and Trademark Office can block patent-validity challenges without any meaningful court oversight, a move that could upend how technology companies defend themselves against infringement lawsuits. The electric vehicle maker filed its petition after the PTO’s Patent Trial and Appeal Board denied four inter partes reviews Tesla requested concerning patents held by Granite Vehicle Ventures, as first reported by electric-vehicles.com. If the Court takes the case, its ruling could reshape a process that Windows ecosystem firms—from chipmakers to software developers—regularly rely on.
What Tesla Asked the Court to Do
Tesla is not asking the justices to force the PTAB to review the specific patents. Instead, the petition targets a deeper, systemic issue: the Federal Circuit’s treatment of discretionary institution denials as effectively unreviewable. Under 35 U.S.C. § 314(d), decisions to institute an inter partes review are “final and nonappealable.” Tesla argues that this bar should not apply when the agency act beyond the authority Congress gave it—what lawyers call an ultra vires action. The company contends the PTO invented a rigid rule about parallel litigation timelines that the America Invents Act never authorized, and that the Federal Circuit has shut the courthouse door by treating any appeal as a forbidden challenge to an institution decision.
The Federal Circuit rejected Tesla’s request for a writ of mandamus in February 2026, pointing to its own precedent that only “colorable constitutional claims” can overcome the statutory finality provision. Tesla’s petition insists that statutory ultra vires claims deserve review too, otherwise a PTO Director could adopt screening rules that effectively gut the IPR system with zero judicial check.
The Trial-Date Rule That Backfired
The PTO’s discretionary-denial framework weighs, among other factors, whether a parallel district court trial is likely to finish before the board would issue a final written decision—typically 12 to 18 months after institution. The logic is resource conservation: avoid duplicate proceedings. In Tesla’s case, the PTO predicted the underlying lawsuit would end first and denied institution.
That forecast collapsed. Granite Vehicle Ventures sued Tesla in the Eastern District of Texas in December 2024, and Tesla met the AIA’s one-year deadline by filing its PTAB petitions in May 2025. The PTO denied review in late 2025, but the lawsuit was transferred to the Northern District of California in December 2025. The new trial date is now June 2028—well after the PTAB could have delivered a final ruling. Tesla also notes it offered a broad stipulation giving up invalidity defenses in court to reduce duplication, yet the PTO still refused. The sequence vividly illustrates, Tesla argues, the “weakness of relying on trial-date forecasts” and the need for a safety valve when the agency’s logic no longer holds.
A Coordinated Effort from Big Tech
Tesla’s filing joins similar Supreme Court petitions from Google and Intel, as detailed in a Bloomberg Law report. Those companies challenge other discretionary-denial rationales—such as the “settled expectations” policy for older patents, which Kahoot! is also contesting—but the core question is the same: can federal courts review PTO institution policies that allegedly exceed the Director’s statutory authority? The Federal Circuit’s February 2026 orders rejecting mandamus from Tesla, Intel, and Kahoot! signal how difficult it has become to raise such arguments through the appellate process.
The Supreme Court has not yet said whether it will take one or more of these cases, or consolidate them. But the alignment among tech giants suggests a concerted effort to test the boundaries of post-grant review. For the Windows ecosystem, the outcome could affect how easily OEMs, ISVs, and even hardware startups can use IPRs to combat patent assertions.
Why This Matters for Windows Users and the Tech Industry
For home users, the legal maneuvering may seem distant, but it directly influences the cost and availability of technology. Inter partes review, created by the America Invents Act of 2011, has become a vital tool for challenging dubious patents without the multimillion-dollar expense of full litigation. Microsoft and its ecosystem partners—Dell, HP, Lenovo, and legions of software developers—have used IPRs to fend off claims targeting everything from Wi-Fi standards and graphics chips to user interface elements and cloud infrastructure.
A PTO Director with uncheckable discretion could make it far harder to initiate such reviews, tilting the field toward patent holders. That could mean more litigation, higher settlement costs, and eventually pricier devices and subscriptions for consumers. Patent assertion entities, often called “trolls,” would benefit from a system where even weak patents are harder to challenge efficiently. IT professionals and corporate counsel managing patent portfolios should recognize this case as a potential pivot point. If the Supreme Court opens the door to judicial review, the PTO might have to curtail or clarify its discretionary policies. If the Court sides with the agency, companies may need to rely more heavily on district court defenses, raising the stakes of every infringement suit.
How We Got Here: The PTAB’s Evolution
The PTAB began operating in 2012 as a faster, cheaper alternative to district court for assessing patent validity. Initially popular among tech firms, it drew criticism from patent owners who branded it a “death squad” for patents. In response, the PTO under Director Andrei Iancu introduced multi-factor discretionary-denial guidance in 2018, expanded under successors. These rules gave the agency broad latitude to reject IPR petitions based on factors like the progress of parallel litigation, the timing of the petition, and the relationship between the parties.
The Federal Circuit’s hands-off approach took root early. In Cuozzo Speed Technologies, LLC v. Lee (2016), the Supreme Court held that the decision to institute an IPR is final and nonappealable under §314(d), even if the PTO applied an incorrect standard. Later, Thryv, Inc. v. Click-to-Call Technologies, LP (2020) reinforced that rule, barring review of timeliness determinations. The Federal Circuit has since interpreted these precedents to preclude nearly all challenges to institution decisions, save for a narrow constitutional exception. Tesla and its allies argue this leaves a glaring gap: when the agency acts beyond its statutory authority—ultra vires—there is no remedy, creating what Tesla calls a “reviewability wall.”
What Should You Do Now?
For most Windows users, no immediate action is needed. But if you are an IT decision-maker, IP manager, or in-house counsel at a company that holds or faces patents, keep a close eye on the Supreme Court’s certiorari docket in the coming months. If you are currently weighing an IPR petition or negotiating a settlement, consult with patent counsel about how potential changes in reviewability might influence your strategy. The existing PTAB process remains in place, but uncertainty over future access could affect the leverage you have in parallel litigation.
What’s Next
The Supreme Court will likely decide whether to grant certiorari by early 2027, with a possible oral argument in late 2027 and a decision by mid-2028. For Tesla, that timeline puts a ruling near or after its June 2028 trial, but the principle would extend far beyond its own dispute. A decision allowing even limited judicial review would prompt the PTO to reexamine its discretionary-denial frameworks and could lead to more predictable rules for the tech industry. A decision upholding the status quo would cement the Director’s power and could encourage more aggressive screening of IPR petitions. Either way, this is the most serious challenge yet to the PTO’s gatekeeping authority, and it deserves the attention of every stakeholder in the Windows and broader technology ecosystem.