ParkerVision Completes Appeal Briefing

ParkerVision Believes Qualcomm Makes Critical Contradiction in its Own Appeal Brief

Mar. 25, 2026 at 11:03am

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ParkerVision, Inc. has completed appellate briefing in its appeal of the Orlando district court's claim construction ruling in its patent infringement case against Qualcomm. In its final brief, ParkerVision highlights that Qualcomm's own appellate filing reveals a critical contradiction that calls into question the basis of the non-infringement stipulation and order of the district court entering judgment thereon.

Why it matters

This case has been ongoing for over a decade and centers around ParkerVision's patent infringement claims against Qualcomm. The outcome of the appeal could determine whether ParkerVision finally gets its day in court to present its case against Qualcomm.

The details

ParkerVision argues that for years, Qualcomm claimed ParkerVision's patents required a specific technical limitation that signal "down-conversion" must occur at or after a capacitor. However, in its new filing before the U.S. Court of Appeals for the Federal Circuit, Qualcomm now takes a fundamentally different position, arguing that the case is not about where down-conversion occurs at all. ParkerVision believes this shift is legally decisive, as it means the earlier case was decided on different issues and therefore, issue preclusion cannot apply. This should reverse the non-infringement stipulation and district court judgment based on it, and send the case back for trial.

  • ParkerVision completed appellate briefing on March 25, 2026.
  • The next step is oral arguments at the Federal Circuit in Washington DC.

The players

ParkerVision, Inc.

An innovator in radio frequency (RF) technologies used in advanced wireless communication systems, with an extensive patent portfolio.

Qualcomm

A multinational semiconductor and telecommunications equipment company that ParkerVision has accused of patent infringement.

Jeffrey Parker

The CEO of ParkerVision.

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What they’re saying

“This is about fundamental fairness and consistency. For years now Qualcomm has argued that ParkerVision's patent claims require down-conversion in a specific location and now in their own brief for the first time they claim that was never the argument. You can't win a case based on a rule and then claim that rule never applied.”

— Jeffrey Parker, CEO

What’s next

The Federal Circuit's decision on the appeal could determine whether ParkerVision finally receives its day in court after more than a decade of litigation in this case.

The takeaway

This case highlights the complex and long-running legal battle between ParkerVision and Qualcomm over patent infringement claims, with the outcome of the appeal potentially paving the way for ParkerVision to finally present its case against Qualcomm.