TurboCode LLC v. Evolve Cellular: LTE Patent Suit Dismissed in 188 Days
TurboCode LLC filed suit in the Western District of Texas asserting US6813742B2 — a patent covering iterative turbo decoding methods central to 3G and 4G/LTE cellular standards — against Evolve Cellular and its Samsung Galaxy A10e and LTE router products. The plaintiff voluntarily dismissed the action without prejudice under Rule 41(a)(1) after 188 days, before any answer or dispositive motion was served.
LTE turbo decoding suit exits W.D. Texas before defendant responds
On June 6, 2024, TurboCode LLC — represented by Direction IP Law — filed an infringement action in the Western District of Texas (Austin Division) before Judge Robert Pitman against Evolve Cellular Inc. The suit centred on US6813742B2, which claims methods of iteratively decoding sequences of received baseband signals, a technique foundational to 3GPP-compliant 3G and 4G/LTE networks. Accused products included the Samsung Galaxy A10e smartphone and an LTE wireless router, as well as any device complying with 3GPP Releases 8–11.
On December 11, 2024 — 188 days after filing — TurboCode LLC filed a Notice of Voluntary Dismissal without Prejudice pursuant to Federal Rule of Civil Procedure 41(a)(1). The rule permits a plaintiff to dismiss unilaterally, without a court order, provided no answer or motion for summary judgment has yet been served by the defendant. The public record contains no indication that Evolve Cellular filed any responsive pleading, suggesting the dismissal was filed at the earliest procedural window available to TurboCode.
A dismissal without prejudice preserves TurboCode’s right to re-file the same claims against Evolve Cellular or other targets, making the resolution distinct from a merits-based defeat. The six-month duration and pre-answer timing are consistent with a negotiated resolution, licensing discussion, or strategic withdrawal, though the public record does not confirm any of these. No fee award or sanctions order appears in the docket, and the underlying patent’s validity was never adjudicated in this proceeding.
Filing to Voluntary dismissal in 188 days
188 days — resolved before answer or summary judgment motion was filed
Voluntary dismissal: what the Rule 41(a)(1) exit means for both parties
Rule 41(a)(1): plaintiff’s unilateral exit before any response
Federal Rule of Civil Procedure 41(a)(1) allows a plaintiff to dismiss an action as of right — with no court order required — provided the defendant has not yet served an answer or a motion for summary judgment. TurboCode invoked this window, meaning the court never evaluated the merits of the infringement claims. The procedural exit is clean: no judgment attaches, no preclusion runs, and the docket closes without any ruling on liability or validity.
No merits adjudicationWithout prejudice — but the public record is silent on why
The notice explicitly states dismissal ‘without prejudice,’ meaning TurboCode retains the right to re-file identical claims against Evolve Cellular or assert the same patent against new defendants. This is legally distinct from a dismissal with prejudice, which would bar re-litigation on the merits. Critically, the public record does not disclose the reason for the withdrawal — whether it reflects a settlement, a licensing agreement, a strategic recalibration, or another factor entirely remains unknown from the available documents.
Re-filing right preservedEvolve Cellular exits with no judgment — but no preclusion shield
Evolve Cellular faces no adverse judgment, no damages award, and no injunction. Because the dismissal is without prejudice, however, it cannot rely on res judicata to block a future identical suit. If TurboCode or a successor-in-interest reasserts US6813742B2, Evolve Cellular would need to litigate the merits afresh. Companies in similar positions often use the interim period to secure a license or conduct a freedom-to-operate analysis on the asserted patent.
No judgment, no preclusion3GPP-standard patent risk persists across the LTE device ecosystem
US6813742B2 is asserted against products that comply with 3GPP Releases 8–11 — a description that encompasses the vast majority of LTE-capable devices and network equipment. A without-prejudice exit does not diminish the patent’s potential reach. Other retailers, MVNOs, and device distributors handling 4G/LTE products face analogous exposure if TurboCode pursues a broader licensing campaign. The case signals that standards-essential or standards-adjacent turbo decoding patents remain an active enforcement vector in W.D. Texas.
LTE-wide patent exposureFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | TurboCode, LLC | Company | Patent licensing entity — holder of US6813742B2 covering LTE turbo decoding methodsSearch in Eureka ↗ |
| Defendant | Evolve Cellular Inc. | Company | Evolve Cellular Inc. — wireless device and LTE router retailer or operatorSearch in Eureka ↗ |
| Plaintiff counsel | David R. Bennett, Esq., | Attorney | Counsel for TurboCode, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Direction IP law | Law Firm | Representing TurboCode, LLCSearch in Eureka ↗ |
| Presiding judge | Judge Robert Pitman | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The dismissal notice invokes Rule 41(a)(1) verbatim, confirming the procedural basis: a unilateral plaintiff exit before any responsive pleading. Critically, the notice specifies ‘without prejudice,’ which preserves TurboCode’s right to re-assert the same claims. No court-entered judgment was issued, so neither claim preclusion nor issue preclusion attaches. For Evolve Cellular, the docket closure provides immediate relief but no permanent protection. The phrasing is standard boilerplate for pre-answer withdrawals and reveals nothing about whether a commercial resolution was reached off-docket.
US6813742B2 — iterative turbo decoding for 3G/4G LTE baseband signals
US6813742B2 (application number US09/681093) claims methods for iteratively decoding a plurality of sequences of received baseband signals — the core turbo decoding process that underpins error correction in 3GPP-compliant cellular networks. Turbo codes were adopted as the mandatory channel coding scheme for 3GPP data channels from Release 99 through Release 11, making patents in this space potentially relevant to any device or infrastructure implementing those standards. The patent’s application predates widespread commercial 4G deployment, giving it a priority date that reaches into the foundational era of the 3GPP specification process.
The strategic significance of US6813742B2 lies in its standards-adjacent framing: by asserting infringement through compliance with 3GPP Releases 8–11, TurboCode effectively positions the patent as potentially readable on any LTE-capable device sold or operated in the United States. This approach is consistent with non-practising entity strategies targeting the long tail of the LTE ecosystem — MVNOs, device resellers, and regional carriers — rather than focusing exclusively on major OEMs. For IP professionals in the cellular, device retail, or mobile infrastructure sectors, this patent warrants close monitoring and potential IPR consideration.
Should you run an FTO against US6813742B2?
Any company selling, distributing, or operating devices that comply with 3GPP Releases 8–11 — including LTE smartphones, wireless routers, hotspots, and network infrastructure — should consider a freedom-to-operate review against US6813742B2. TurboCode’s complaint in this case expressly targeted retail-level defendants (a device reseller and its product catalogue), not just manufacturers, broadening the class of entities at risk. MVNOs, e-commerce retailers carrying LTE devices, and enterprise buyers of 4G equipment are all within the potential scope of future assertions.
PatSnap Eureka’s FTO Search Agent can map US6813742B2’s independent claims against your product specifications, flag relevant prior art that could support an IPR petition, and identify whether any prosecution history estoppel limits the patent’s reach. Eureka’s citation graph also surfaces related family members and continuation risk — critical in standards-based assertion campaigns where related applications may extend coverage beyond the granted claims of US6813742B2.
Run a freedom-to-operate analysis on US6813742B2 to assess your product’s exposure
Run FTO in Eureka →Similar LTE standards patent infringement cases in W.D. Texas
Cases involving 3GPP/LTE standards-adjacent turbo decoding or baseband signal patents litigated in the Western District of Texas before Judge Pitman and related judges.
What this case signals for the cellular standards IP landscape
A pre-answer exit in W.D. Texas on a 3GPP turbo decoding patent raises enforcement and FTO questions across the LTE device supply chain.
Pre-answer dismissals in W.D. Texas often mask off-docket licensing activity
When a patent plaintiff voluntarily dismisses under Rule 41(a)(1) before any defendant response, the most commercially likely explanation is a negotiated resolution — whether a license, covenant not to sue, or strategic withdrawal. Companies receiving demand letters from TurboCode on US6813742B2 should evaluate whether early engagement is preferable to costly motion practice.
3GPP-standard turbo decoding claims can sweep broadly across LTE device defendants
TurboCode’s complaint framed infringement as arising from compliance with 3GPP Releases 8–11, not from any single product design choice. This standards-based framing means any retailer, distributor, or operator of LTE-capable devices is a potential target. MVNO operators and device resellers — not just OEMs — should assess their exposure to US6813742B2.
TurboCode v Evolve — key questions answered
A voluntary dismissal without prejudice under Rule 41(a)(1) means TurboCode ended the lawsuit unilaterally before Evolve Cellular filed any answer or summary judgment motion. No judgment was entered, no merits were decided, and TurboCode retains the right to re-file the same claims against Evolve Cellular or other defendants in the future. Evolve Cellular faces no damages award or injunction from this proceeding.
US6813742B2 claims methods for iteratively decoding sequences of received baseband signals — the turbo decoding process mandated by 3GPP for 3G and 4G LTE data channels under Releases 8–11. Because turbo codes are built into the 3GPP specification, virtually any LTE-compliant device — smartphones, routers, hotspots, and base stations — could be read as practising the claimed method, making the patent broadly relevant to the LTE device ecosystem.
Yes. A dismissal without prejudice explicitly preserves the plaintiff’s right to re-assert the same claims. TurboCode could refile against Evolve Cellular in the same or a different court, or assert US6813742B2 against other LTE device retailers, distributors, or operators. The only procedural constraint is the applicable statute of limitations for patent infringement, which runs six years from the date of the infringing acts under 35 U.S.C. § 286.
No. The case was voluntarily dismissed before Evolve Cellular served any answer or motion for summary judgment, meaning the court never addressed the merits of TurboCode’s infringement allegations or any validity defence. US6813742B2 has not been adjudicated invalid or not infringed in this proceeding. A future defendant wishing to challenge the patent would need to raise those defences in new litigation or file an IPR petition at the USPTO.
The Western District of Texas, particularly the Austin Division, has been a preferred forum for patent assertion entities due to its established patent litigation docket and procedural familiarity. Judge Robert Pitman presided over this case. Filing in W.D. Texas is consistent with strategies employed by NPEs and licensing firms seeking efficient resolution, and the pre-answer voluntary dismissal here is a pattern seen in licensing-focused enforcement campaigns in that district.
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