DigiMedia Tech v. Alcatel-Lucent & TCT Mobile: Dismissed With Prejudice
DigiMedia Tech, LLC asserted three multimedia and video-processing patents against Alcatel-Lucent and TCT Mobile — targeting the Alcatel 3x, TCL 20 series, and TCL 10 series smartphones. The case was voluntarily dismissed with prejudice under Rule 41(a)(1) after 497 days, permanently closing DigiMedia’s infringement claims.
Multimedia patent assertion ends in permanent voluntary dismissal
On 17 February 2023, DigiMedia Tech, LLC filed a patent infringement action in the District of Delaware against Alcatel-Lucent, Inc. and TCT Mobile, Inc., asserting three patents — US6606287B2, US6473532B1, and US7715476B2 — covering multimedia encoding, image processing, and head-tracking and video storage technology. The accused products included the Alcatel 3x smartphone, the TCL 20 series (head-tracking functionality), and the TCL 10 series (video storage functionality), placing this squarely in the consumer mobile device sector.
On 28 June 2024, DigiMedia Tech filed a Notice of Voluntary Dismissal with Prejudice pursuant to Rule 41(a)(1)(A)(i), terminating the action without any court order. The with-prejudice designation is legally significant: DigiMedia is permanently barred from re-asserting the same patent claims against Alcatel-Lucent and TCT Mobile on the same accused products. No verdict, liability finding, or damages award was issued. The defendants secured a full exit without a merits adjudication.
The case ran for 497 days before dismissal — a span consistent with a case reaching or approaching substantive motion practice before resolution. The public record does not disclose whether a settlement agreement, licensing arrangement, or litigation cost calculus drove the dismissal. The absence of a fee-shifting order under 35 U.S.C. § 285 leaves the financial terms, if any, entirely private. What remains notable is the with-prejudice election: DigiMedia chose to permanently foreclose future enforcement rather than dismiss without prejudice and preserve optionality.
Filing to Voluntary dismissal in 497 days
497 days — longer than the median Delaware District patent dismissal, suggesting substantive engagement before resolution.
Dismissed with prejudice: what Rule 41 finality means for both sides
Rule 41(a)(1)(A)(i): plaintiff-initiated, no court order required
Under FRCP 41(a)(1)(A)(i), a plaintiff may dismiss an action as of right by filing a notice before the defendant serves an answer or a motion for summary judgment. DigiMedia invoked this mechanism and elected the with-prejudice designation, which transforms a voluntary procedural act into a final adjudication on the merits for res judicata purposes — permanently extinguishing the asserted claims against these defendants.
Rule 41(a)(1)(A)(i) — with prejudiceWith prejudice bars DigiMedia from re-filing these claims
A dismissal with prejudice operates as a final judgment on the merits. DigiMedia cannot re-assert US6606287B2, US6473532B1, or US7715476B2 against Alcatel-Lucent or TCT Mobile for the same accused products in any future proceeding. This is a materially different outcome from a without-prejudice dismissal, which would have preserved the option to re-file. The public record specifies ‘with prejudice’ explicitly — there is no ambiguity on this point.
Permanent bar on re-filingAlcatel-Lucent and TCT Mobile exit without liability finding
Both defendants secured a complete exit from litigation without any finding of infringement, validity determination, or damages award. The with-prejudice dismissal provides them with res judicata protection against DigiMedia re-asserting these specific claims on the same accused products. However, the patents themselves remain in force, and the dismissal does not preclude DigiMedia from asserting the patents against different defendants or different product generations.
No liability — res judicata protectionPatents survive — enforcement risk shifts to other market players
The three asserted patents remain valid and enforceable against the broader market. DigiMedia’s decision to dismiss with prejudice against these specific defendants may suggest a commercial resolution, but it does not signal patent abandonment. Other smartphone OEMs incorporating similar multimedia encoding, head-tracking, or video storage functionality should treat these patents as active enforcement risks. The absence of any IPR filing or invalidity ruling leaves the patents’ claims fully intact.
Patents remain enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | DigiMedia Tech, LLC | Company | Patent assertion entity — holder of US6606287B2, US6473532B1, and US7715476B2Search in Eureka ↗ |
| Defendant | Alcatel-Lucent, Inc. | Company | Alcatel-Lucent, Inc. and TCT Mobile, Inc. — smartphone manufacturers in the Alcatel/TCL product family.Search in Eureka ↗ |
| Co-Defendant | TCT Mobile, Inc. | Company | Search in Eureka ↗ |
| Plaintiff counsel | Cortney S. Alexander | Attorney | Counsel for DigiMedia Tech, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Richard Charles Weinblatt | Attorney | Counsel for DigiMedia Tech, LLCSearch in Eureka ↗ |
| Plaintiff counsel | Stamatios Stamoulis | Attorney | Counsel for DigiMedia Tech, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Stamoulis & Weinblatt LLC | Law Firm | Representing DigiMedia Tech, LLCSearch in Eureka ↗ |
| Defendant counsel | Chad S.C. Stover | Attorney | Counsel for Alcatel-Lucent, Inc.Search in Eureka ↗ |
| Defendant counsel | Donald R. McPhail | Attorney | Counsel for Alcatel-Lucent, Inc.Search in Eureka ↗ |
| Defendant law firm | Barnes & Thornburg, LLP | Law Firm | Representing Alcatel-Lucent, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Maryellen Noreika | Judge | Delaware District CourtSearch in Eureka ↗ |
Official order — verbatim text
DigiMedia’s notice explicitly invokes Rule 41(a)(1)(A)(i) and designates the dismissal as ‘with prejudice,’ leaving no interpretive ambiguity. The phrasing ‘voluntarily dismisses this action against Defendants with prejudice’ covers both Alcatel-Lucent and TCT Mobile simultaneously. Because no answer had been served, the rule permitted a unilateral exit — but the with-prejudice election elevates this beyond a routine procedural withdrawal, functioning as a final merits adjudication for res judicata purposes under Federal Circuit precedent.
US6606287B2, US6473532B1 & US7715476B2 — Multimedia, image processing and head-tracking patents
The three asserted patents span distinct but commercially adjacent technology areas within the smartphone multimedia stack. US6606287B2 and US6473532B1, with application dates in the early 2000s, cover foundational multimedia encoding and image/video signal processing — technologies that became ubiquitous in feature phones and early smartphones. US7715476B2, filed later (application US11/112433), addresses head-tracking and video storage functionality, which maps more directly onto the TCL 20 series features accused in this case. Together, the portfolio targets core camera, video, and motion-sensing functionality.
For the smartphone sector, patents with early priority dates in multimedia processing carry strategic weight precisely because they predate widespread industry standardisation. If the claims read broadly enough to cover modern implementations, they can generate significant licensing leverage regardless of the original inventor’s market position. DigiMedia’s selection of Alcatel-Lucent and TCT Mobile — both part of the broader Nokia/TCL ecosystem — suggests a targeted approach to mid-tier Android OEMs, where litigation cost asymmetry may favour assertion. Other OEMs with comparable multimedia pipelines should treat this portfolio as a credible enforcement risk.
Should your team run an FTO against US6606287B2, US6473532B1 and US7715476B2?
Any product team shipping Android smartphones with multimedia encoding, video storage, image processing, or head-tracking functionality should consider an FTO assessment against these three patents. The dismissal against Alcatel-Lucent and TCT Mobile does not limit enforceability against other OEMs. Given the early priority dates on two of the three patents, a thorough claim mapping against your specific product architecture — particularly camera pipelines, video buffering, and sensor-fusion stacks — is warranted before assuming non-infringement.
PatSnap Eureka’s FTO Search Agent can parse the claim language of US6606287B2, US6473532B1, and US7715476B2 against your product specification, surface relevant prior art that could support invalidity arguments, and identify prosecution history estoppel limitations. For R&D teams designing next-generation multimedia or motion-tracking features, running a landscape search alongside claim mapping provides the earliest possible signal of infringement risk — reducing downstream legal exposure.
Run a freedom-to-operate analysis on US6606287B2 to assess your product’s exposure
Run FTO in Eureka →Similar multimedia patent cases in Delaware District Court
Explore comparable patent infringement actions asserting multimedia, video processing, and smartphone functionality patents before the Delaware District Court.
What this case signals for the smartphone multimedia patent landscape
A with-prejudice exit after 497 days raises questions about licensing strategy and the durability of multimedia patent assertions against mobile OEMs.
With-prejudice dismissal permanently closes this litigation chapter
DigiMedia cannot re-assert these three patents against Alcatel-Lucent or TCT Mobile on the same accused products. Any future enforcement by DigiMedia must target different defendants or materially different product lines. IP counsel for mobile OEMs should confirm whether their specific product variants were within scope of the dismissed action.
No invalidity ruling means the patents remain a live risk for other OEMs
The dismissal produced no claim construction order, no invalidity finding, and no § 101 ruling. US6606287B2, US6473532B1, and US7715476B2 retain full enforceability. Competitors with multimedia encoding, head-tracking, or video storage features in their smartphone portfolios should assess their FTO exposure proactively rather than assuming the patents are weakened.
DigiMedia v Alcatel-Lucent — key questions answered
A dismissal with prejudice under Rule 41(a)(1) operates as a final judgment on the merits for res judicata purposes. DigiMedia Tech cannot re-assert US6606287B2, US6473532B1, or US7715476B2 against Alcatel-Lucent or TCT Mobile on the same accused products. The patents remain enforceable against other defendants.
DigiMedia asserted three patents: US6606287B2 (multimedia encoding), US6473532B1 (image/video signal processing), and US7715476B2 (head-tracking and video storage). The accused products were the Alcatel 3x smartphone, TCL 20 series (head-tracking), and TCL 10 series (video storage).
The public record does not disclose the reason for the dismissal. DigiMedia filed a unilateral notice under Rule 41(a)(1)(A)(i), requiring no court order and no defendant consent. The 497-day duration suggests substantive engagement occurred before the dismissal, but no settlement terms, licensing agreement, or motion outcomes are publicly available.
No. The voluntary dismissal produced no claim construction ruling, no IPR proceeding, and no invalidity finding. All three patents remain presumptively valid and fully enforceable. The dismissal provides no basis for other defendants to argue patent invalidity or unenforceability.
The case (No. 1:23-cv-00191) was filed in the District of Delaware and assigned to Judge Maryellen Noreika. The plaintiff was represented by Stamoulis & Weinblatt LLC; the defendants were represented by Barnes & Thornburg, LLP.
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