Step Technologies v. Rockford Corporation: Patent Infringement Dismissed With Prejudice
Step Technologies Inc. brought a patent infringement action against audio equipment maker Rockford Corporation in Arizona District Court, asserting US7031487B2 covering the Vertical Attach Surround Technique (VAST) product line. The parties jointly stipulated to dismissal with prejudice in under 292 days, with each side bearing its own costs and attorneys’ fees.
VAST Patent Dispute Ends in Bilateral Walkaway After 292 Days
Step Technologies Inc. filed suit against Rockford Corporation on 8 September 2023 in the U.S. District Court for the District of Arizona (Case No. 2:23-cv-01885), asserting infringement of US7031487B2. The patent relates to the Vertical Attach Surround Technique — marketed under the VAST brand — a spatial audio technology used in speaker and audio equipment design. Rockford Corporation, a well-known manufacturer of car audio and consumer electronics, was named as the sole defendant.
The case closed on 26 June 2024 via a joint stipulation of dismissal with prejudice filed under Federal Rule of Civil Procedure 41(a)(1)(A)(ii), which requires agreement of all parties. Judge John J. Tuchi granted the stipulation and ordered the Clerk to close the matter. Dismissal with prejudice permanently extinguishes Step Technologies’ right to re-assert the same claims against Rockford on the same patent. The no-cost-shifting term — each side bearing its own fees — is a hallmark of negotiated resolution rather than adjudicated victory.
The 292-day duration from filing to close is consistent with a matter that reached resolution well before any Markman hearing or trial. The mutual agreement on costs and the with-prejudice character of the dismissal together suggest the parties likely reached a commercial accommodation, though the public record does not disclose specific settlement terms. What drove that accommodation — whether a licensing arrangement, a design-around, or simply a commercial decision to avoid litigation costs — remains unknown from the docket.
Filing to Dismissed with Prejudice in 292 days
292 days — resolved before trial, faster than the median U.S. patent case lifespan
Dismissed with prejudice: what the joint stipulation means for both parties
Rule 41(a)(1)(A)(ii) requires both parties’ consent
A stipulated dismissal under Fed. R. Civ. P. 41(a)(1)(A)(ii) is a bilateral act — it cannot be entered unilaterally after an answer has been filed. Both Step Technologies and Rockford signed off, signalling mutual agreement to end the litigation. The court’s role was ministerial: on receipt of the stipulation, Judge Tuchi granted it and directed the Clerk to close. No judicial merits ruling was issued.
Bilateral stipulated dismissalStep Technologies cannot refile this infringement claim against Rockford
Dismissal with prejudice operates as a final adjudication on the merits under res judicata principles. Step Technologies is permanently barred from reasserting US7031487B2 against Rockford Corporation on the same accused products and conduct. This is a materially stronger concession than a without-prejudice dismissal, and typically indicates the plaintiff received or agreed to something in return — though no terms are publicly disclosed.
Claim extinguished against RockfordRockford secures permanent closure on this VAST patent claim
For Rockford Corporation, the with-prejudice dismissal provides certainty: this specific patent assertion by Step Technologies cannot be revived. The no-fee-shifting order means Rockford absorbs its own defence costs — consistent with a negotiated exit rather than a courtroom win. Rockford’s exposure to US7031487B2 claims from Step Technologies is effectively ended, which may have commercial value proportionate to the VAST product line’s revenue contribution.
Permanent closure for RockfordVAST technology IP remains live against other market participants
The dismissal resolves only the Rockford dispute. US7031487B2 remains an issued, enforceable patent and Step Technologies retains the right to assert it against other audio equipment manufacturers or distributors offering comparable surround technology. Competitors and product teams in the spatial audio and car audio segments should note that this case’s resolution does not signal abandonment of the underlying patent.
Patent still enforceable vs. othersFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Step Technologies Incorporation | Company | Audio technology IP licensor — holder of US7031487B2 (VAST surround technology)Search in Eureka ↗ |
| Defendant | Rockford Corporation | Company | Rockford Corporation — car audio and consumer electronics manufacturerSearch in Eureka ↗ |
| Plaintiff counsel | Adam K. Yowell | Attorney | Counsel for Step Technologies IncorporationSearch in Eureka ↗ |
| Plaintiff counsel | Amanda Eliane Newman | Attorney | Counsel for Step Technologies IncorporationSearch in Eureka ↗ |
| Plaintiff counsel | Ian Richard Walsworth | Attorney | Counsel for Step Technologies IncorporationSearch in Eureka ↗ |
| Plaintiff counsel | Patricia Yih-Ting Ho | Attorney | Counsel for Step Technologies IncorporationSearch in Eureka ↗ |
| Plaintiff law firm | Dickinson Wright PLLC | Law Firm | Representing Step Technologies IncorporationSearch in Eureka ↗ |
| Plaintiff law firm | Fisher Broyles, LLP (Denver, CO) | Law Firm | Representing Step Technologies IncorporationSearch in Eureka ↗ |
| Plaintiff law firm | Fisherbroyles, LLP (Reno) | Law Firm | Representing Step Technologies IncorporationSearch in Eureka ↗ |
| Defendant counsel | David Gary Barker | Attorney | Counsel for Rockford CorporationSearch in Eureka ↗ |
| Defendant counsel | Zachary Gerald Schroeder | Attorney | Counsel for Rockford CorporationSearch in Eureka ↗ |
| Defendant law firm | Snell & Wilmer LLP | Law Firm | Representing Rockford CorporationSearch in Eureka ↗ |
| Presiding judge | Judge John J Tuchi | Judge | Arizona District CourtSearch in Eureka ↗ |
Official order — verbatim text
The verdict text records a pure procedural close: Judge Tuchi granted the joint Rule 41(a)(1)(A)(ii) stipulation, ordered dismissal with prejudice, specified each party bears its own costs, and directed the Clerk to close. No infringement finding, claim construction ruling, or damages assessment was issued. The with-prejudice designation is the legally significant element — it permanently forecloses Step Technologies from reasserting the same patent claims against Rockford, giving the defendant durable protection without a merits adjudication.
US7031487B2 — Vertical Attach Surround Technique (VAST) Audio Technology
US7031487B2 was filed under application number US10/437742 and covers the Vertical Attach Surround Technique — a spatial audio approach marketed under the VAST brand. The technology relates to the design and configuration of speaker systems to create immersive surround-sound experiences, a domain relevant to both consumer electronics and in-vehicle audio systems. The patent’s issued status at the time of suit made it immediately enforceable without further prosecution steps.
VAST-type spatial audio processing sits at the intersection of consumer speaker design, automotive infotainment, and professional audio. As car OEMs and aftermarket audio suppliers integrate increasingly sophisticated sound staging into their platforms, patents covering surround sound configuration methods carry material commercial risk. Step Technologies’ decision to assert US7031487B2 against Rockford — one of the market’s prominent car audio brands — signals that the patent holder views the technology as commercially live and enforceable. Other market participants with surround sound or vertical array speaker products should treat this patent as an active risk.
Should you run an FTO against US7031487B2?
Any company manufacturing, importing, or selling audio equipment that employs vertical or spatial surround sound techniques — particularly in the car audio, home theatre, or soundbar categories — should consider whether their product configurations fall within the claim scope of US7031487B2. The Rockford litigation demonstrates that Step Technologies is prepared to enforce this patent in federal court. Product teams finalising speaker array architectures or surround sound processing pipelines face the highest exposure.
PatSnap Eureka’s FTO Search Agent can map the claim landscape of US7031487B2 against your product specifications, flag prior art that may support a validity challenge, and surface related family members or continuation filings that could extend the patent’s effective reach. Running a targeted FTO before product launch or platform lock-in is materially cheaper than defending an infringement action — particularly one that, as here, may resolve through a commercially costly negotiated exit.
Run a freedom-to-operate analysis on US7031487B2 to assess your product’s exposure
Run FTO in Eureka →Similar Audio Technology Patent Cases in U.S. District Courts
Cases involving spatial audio and speaker system patents litigated in U.S. district courts, including Arizona, with comparable infringement and dismissal patterns.
What this case signals for the spatial audio IP landscape
A with-prejudice bilateral exit in under 292 days typically reflects a deliberate commercial calculus — not a clean defence win.
With-prejudice exits often mask undisclosed licensing or design-around deals
When a plaintiff agrees to dismiss with prejudice — permanently surrendering future claims — it rarely does so without receiving something of value. In patent cases, that ‘something’ is most commonly a licensing payment, a royalty arrangement, or a product redesign commitment. The public record here is silent, but the structure of the exit is consistent with a negotiated resolution rather than a plaintiff concession of weakness.
US7031487B2 remains a litigation-ready asset for Step Technologies
The Rockford dismissal does not exhaust or impair the patent. Audio equipment makers whose products incorporate spatial audio processing or vertical surround techniques similar to VAST should monitor Step Technologies’ enforcement activity. A single resolved assertion against one defendant is sometimes a precursor to broader licensing campaigns targeting the wider market.
Step v Rockford — key questions answered
The case was dismissed with prejudice on 26 June 2024 pursuant to a joint stipulation under Fed. R. Civ. P. 41(a)(1)(A)(ii). Both parties agreed to bear their own costs and attorneys’ fees. No merits ruling was issued by the court.
Step Technologies asserted US7031487B2 (application no. US10/437742), which covers the Vertical Attach Surround Technique (VAST) — a spatial audio speaker configuration technology. The accused products were Rockford’s VAST product line.
No. A dismissal with prejudice under Rule 41(a)(1)(A)(ii) is a procedural termination, not a ruling on patent validity or enforceability. US7031487B2 remains an issued, enforceable patent. Step Technologies retains full rights to assert it against other parties.
Parties frequently structure patent resolutions so that the financial terms remain confidential while the court record reflects only the procedural dismissal. A with-prejudice stipulation is consistent with Step Technologies having received a licensing payment or other consideration — though the public docket does not confirm this.
Step Technologies was represented by Dickinson Wright PLLC, Fisher Broyles LLP (Denver, CO), and Fisherbroyles LLP (Reno), with attorneys Adam K. Yowell, Amanda Eliane Newman, Ian Richard Walsworth, and Patricia Yih-Ting Ho. Rockford Corporation was represented by Snell & Wilmer LLP, with attorneys David Gary Barker and Zachary Gerald Schroeder.
PatSnap Eureka searches patents and litigation data to answer instantly.