VDPP, LLC v. Lenovo, Inc. — 3D Spectacles Patent Action Dismissed Without Prejudice
VDPP, LLC asserted US10021380B1 — covering faster state transitioning for continuous adjustable 3D filter spectacles using multi-layered variable tint materials — against Lenovo, Inc. in the Western District of Texas. The plaintiff voluntarily dismissed all claims without prejudice after 166 days, before Lenovo filed any answer or dispositive motion.
Early voluntary exit before Lenovo responds in 3D optics patent dispute
On July 31, 2024, VDPP, LLC filed a patent infringement action against Lenovo, Inc. in the Western District of Texas (Case No. 7:24-cv-00182), asserting US10021380B1, a patent directed to faster state transitioning in continuous adjustable 3Deeps filter spectacles using multi-layered variable tint materials. The suit targeted Lenovo products alleged to practice this display eyewear technology. VDPP was represented by William P. Ramey III of Ramey LLP, a firm with a well-documented history of patent assertion in Texas federal courts.
On January 10, 2025, VDPP filed a Notice of Voluntary Dismissal Without Prejudice pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i), citing the fact that Lenovo had not yet served an answer or motion for summary judgment. The court confirmed on January 13, 2025 that the notice was self-effectuating — no court order was required to terminate the case. Each party was directed to bear its own costs, expenses, and attorney fees, and all pending motions were denied as moot.
The 166-day duration and pre-answer dismissal timing are notable. The absence of any responsive pleading from Lenovo suggests the case may have resolved through early negotiation, licensing discussion, or a strategic reassessment by the plaintiff — though the public record does not disclose the underlying reason. Because dismissal was without prejudice, VDPP retains the right to refile substantially similar claims against Lenovo, subject to applicable statutes of limitations and any tolling considerations.
Filing to Voluntary dismissal in 166 days
166 days — resolved before defendant answered, suggesting early-stage withdrawal
Voluntarily dismissed without prejudice: what the ruling means for both parties
Rule 41(a)(1)(A)(i): self-effectuating pre-answer dismissal
Under FRCP 41(a)(1)(A)(i), a plaintiff may voluntarily dismiss an action without a court order by filing a notice before the opposing party serves an answer or motion for summary judgment. Because Lenovo had not yet responded, VDPP’s notice was self-effectuating — the case terminated automatically upon filing. No judicial merits ruling was issued and no findings were made regarding the validity or infringement of US10021380B1.
No merits adjudicationWithout prejudice confirmed — but public record is silent on the reason
A dismissal ‘without prejudice’ preserves the plaintiff’s right to refile the same claims; a dismissal ‘with prejudice’ extinguishes them permanently. VDPP’s notice explicitly invoked the without-prejudice default under Rule 41(a)(1)(A)(i). The public docket does not disclose whether any settlement, license, or side agreement accompanied the withdrawal — that distinction carries significant commercial consequence but is not resolved by the available record.
Refiling rights preservedLenovo exits without prejudice — exposure not permanently extinguished
Lenovo achieved dismissal without expending resources on an answer or dispositive motions, and without any adverse finding on infringement or validity. However, because the dismissal is without prejudice, Lenovo’s freedom-to-operate position regarding US10021380B1 and related 3D spectacles technology is not conclusively established. A refiled action — or assertions against other Lenovo products in the same technical space — remains a live risk.
No final infringement findingUS10021380B1 remains enforceable — downstream risk for 3D display sector
The voluntary dismissal leaves US10021380B1 intact, with no validity challenge resolved on the merits. Companies developing or distributing products involving adjustable variable tint lens or 3D filter eyewear technology — particularly those competing with or supplying Lenovo’s ecosystem — should note that VDPP retains full enforcement rights. The patent’s status and claim scope are unchanged by this proceeding, consistent with continued assertion risk across the sector.
Patent still enforceableFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | VDPP, LLC | Company | Patent assertion entity — holder of US10021380B1 covering 3D filter spectacles technologySearch in Eureka ↗ |
| Defendant | Lenovo, Inc. | Company | Lenovo, Inc. — global consumer electronics and PC hardware manufacturerSearch in Eureka ↗ |
| Plaintiff counsel | William P. Ramey , III | Attorney | Counsel for VDPP, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Ramey LLP | Law Firm | Representing VDPP, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order confirms that VDPP’s Rule 41(a)(1)(A)(i) notice was self-effectuating — no judicial determination of infringement, validity, or claim scope was made. The without-prejudice designation is legally significant: it preserves VDPP’s right to reassert US10021380B1 against Lenovo in a future action. The cost-bearing order (each party bears its own) is the default under Rule 41 absent agreement otherwise, and does not imply any finding of bad faith or improper assertion.
US10021380B1 — Adjustable 3D Filter Spectacles, Variable Tint Technology
US10021380B1 (application no. US15/907614) protects technology relating to the speed and mechanism of optical state transitions in adjustable 3Deeps filter spectacles — specifically the use of multi-layered variable tint materials to achieve continuous, faster switching between optical states. This is relevant to 3D display systems where precise synchronisation between lens state and display refresh rate is critical for image quality. The patent designation ‘B1’ indicates it issued without pre-grant publication, suggesting a relatively streamlined prosecution history.
In the context of consumer electronics and display technology, patents covering the physical optics layer of 3D viewing systems occupy a strategically significant position — particularly as AR and VR headset form factors increasingly incorporate electronically switchable lens materials. US10021380B1’s claim scope around multi-layered variable tint and state transition speed could plausibly read on components used in a range of adjustable eyewear products beyond traditional 3D cinema glasses. For companies in the wearable display supply chain, the enforceability of this patent post-dismissal warrants proactive monitoring.
Should your product team run an FTO against US10021380B1?
Any R&D team developing products involving electronically switchable lenses, variable tint eyewear, multi-layered optical filters, or 3D display synchronisation hardware should treat US10021380B1 as a live FTO concern. The voluntary dismissal against Lenovo did not resolve claim scope or validity — the patent is active and enforceable. Given VDPP’s willingness to assert in federal court, companies commercialising adjacent technologies in the AR, VR, 3D cinema, or smart eyewear segments face meaningful assertion exposure.
PatSnap Eureka’s FTO Search Agent can map the claim language of US10021380B1 against your product’s technical specification, identify relevant prior art that could support an IPR petition, and surface the full citation and family landscape around this patent. For in-house counsel and product teams, this analysis can inform design-around decisions, licensing negotiations, or an IPR filing strategy before VDPP refiles against your organisation or a key supply chain partner.
Run a freedom-to-operate analysis on US10021380B1 to assess your product’s exposure
Run FTO in Eureka →Similar 3D display optics patent cases in Texas Western District
Cases involving adjustable optical filter and 3D display spectacles patents in the Western District of Texas, including other Ramey LLP assertions against consumer electronics defendants.
What this case signals for the 3D display optics IP landscape
Pre-answer voluntary dismissals in Texas patent cases often precede licensing discussions or strategic pivots — here is what practitioners and product teams should watch.
Ramey LLP’s filing pattern signals assertion, not litigation endurance
Ramey LLP is consistently associated with high-volume patent assertion in Texas Western District. A pre-answer voluntary dismissal without prejudice — before any substantive defence is filed — is consistent with a demand-and-monitor strategy rather than a case built for trial. Companies in the 3D display and AR/VR eyewear space should treat this filing pattern as an indicator of assertion-stage risk rather than litigation depth.
Without prejudice dismissal means the clock has not stopped for Lenovo
Lenovo has not obtained a covenant not to sue, a licence, or an invalidity ruling. US10021380B1 remains fully enforceable. Any Lenovo product line involving variable tint or multi-layered optical filter technology in display eyewear remains potentially within scope. Monitoring VDPP’s future filing activity against other defendants asserting this patent is advisable for Lenovo and its supply chain partners.
VDPP v Lenovo — key questions answered
It means VDPP voluntarily ended the case before Lenovo filed an answer, with no merits ruling on infringement or validity. The ‘without prejudice’ designation preserves VDPP’s right to refile the same claims against Lenovo in a future action. No determination was made regarding US10021380B1’s validity or scope.
Yes. The voluntary dismissal without prejudice does not affect the enforceability of US10021380B1. No invalidity finding, claim construction ruling, or covenant not to sue was issued. The patent remains fully active and VDPP retains all enforcement rights against Lenovo and other parties in the 3D display and adjustable optics sector.
The public record does not disclose the underlying reason for the pre-answer dismissal. It is consistent with several scenarios: early licensing or settlement discussions, a strategic reassessment by VDPP, or a demand-and-withdraw approach. Ramey LLP’s filing pattern across Texas cases suggests assertion-stage activity, though no conclusion can be drawn from this record alone.
Yes. Because the dismissal was without prejudice, VDPP may refile against Lenovo provided the applicable statute of limitations has not expired. Lenovo did not obtain a covenant not to sue or a licence, and no IPR petition was filed to challenge the patent’s validity. The litigation risk from US10021380B1 for Lenovo and similarly situated defendants persists.
FRCP 41(a)(1)(A)(i) permits a plaintiff to voluntarily dismiss an action without a court order by filing a notice before the defendant has served an answer or motion for summary judgment. In this case, Lenovo had not yet answered, so VDPP’s January 10, 2025 notice was self-effectuating — the case terminated automatically upon filing, with no judicial action required beyond the court’s confirmatory order on January 13, 2025.
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