Mesa Digital v. OnePlus USA: 22-Device Infringement Suit Ends in Prejudicial Dismissal
Mesa Digital, LLC filed a patent infringement action in the Northern District of Texas against One Plus USA Corp, asserting US9031537B2 across 22 OnePlus smartphone models ranging from the OnePlus One to the OnePlus 11 and OnePlus Open. The parties jointly stipulated dismissal with prejudice after 363 days, with each side bearing its own costs.
A broad smartphone sweep ends in a bilateral walkaway with finality
On December 21, 2023, Mesa Digital, LLC — a patent assertion entity represented by Ramey LLP — filed suit against One Plus USA Corp in the Northern District of Texas (Case No. 3:23-cv-02830) before Judge Brantley Starr, asserting US9031537B2 against an unusually wide product range of 22 OnePlus smartphone models spanning six generations, from the original OnePlus One through the flagship OnePlus 11 5G and the foldable OnePlus Open.
The case closed on December 18, 2024 — 363 days after filing — when both parties filed a joint stipulation of dismissal under Federal Rule of Civil Procedure 41(a)(1)(A)(ii). The dismissal is expressly with prejudice as to the asserted patent, and each party agreed to bear its own attorneys’ fees, costs, and expenses. The with-prejudice designation bars Mesa Digital from reasserting US9031537B2 against OnePlus USA on any of the 22 accused products.
The near-identical filing and closing calendar dates — December 21, 2023 and December 18, 2024 — suggest the matter was resolved before trial and likely before significant merits litigation. The mutual cost-bearing arrangement and absence of any disclosed financial terms are consistent with a confidential settlement, though the public record is silent on whether consideration changed hands. The with-prejudice nature of the dismissal provides OnePlus with a durable defence against re-litigation of this specific patent.
Filing to Dismissed with Prejudice in 363 days
363 days — resolved within a single calendar year, faster than the N.D. Tex. median for patent cases
Dismissed with prejudice: what the joint stipulation means for both parties
Rule 41(a)(1)(A)(ii) joint stipulation: the gold-standard dismissal route
Under FRCP 41(a)(1)(A)(ii), a plaintiff may voluntarily dismiss an action without a court order when all parties who have appeared sign a stipulation. Because the parties here expressly designated the dismissal as with prejudice, the court is not required to issue a separate order — the stipulation itself operates as a final judgment on the merits, foreclosing any future re-filing of the same claims.
Procedural finalityWith-prejudice bar: Mesa Digital forfeits the right to re-assert this patent
By agreeing to a with-prejudice dismissal, Mesa Digital permanently surrenders its ability to bring further claims against OnePlus USA under US9031537B2. This outcome is materially weaker than a settlement that preserves re-filing rights. It suggests either that Mesa Digital received sufficient consideration to accept finality, or that the merits position on the patent was sufficiently challenged to make re-litigation unattractive.
Enforcement foreclosedOnePlus secures permanent release from this patent across all 22 accused products
The with-prejudice dismissal gives OnePlus USA a clean, permanent release from US9031537B2 claims on its entire accused product range — from legacy devices like the OnePlus One through current flagships including the OnePlus 11 5G and the OnePlus Open. The own-costs arrangement avoids the reputational and financial exposure of a fee-shifting motion, while the finality of the dismissal removes ongoing litigation risk from the company’s product portfolio.
Full portfolio clearedPAE campaign extinguished: what this signals for the broader OnePlus IP posture
Ramey LLP is a prolific patent assertion filer; resolution with prejudice in under a year, with no fee award, is consistent with a pattern where defendants resist and either invalidate the asserted claims or reach an undisclosed licence. For OnePlus’s U.S. market strategy, this dismissal removes a cloud over 22 SKUs but does not foreclose challenges from other holders of related wireless communication patents targeting the same product lines.
PAE risk resolvedFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Mesa Digital, LLC | Company | Patent assertion entity — holder of US9031537B2 covering mobile wireless communication technologySearch in Eureka ↗ |
| Defendant | One Plus USA Corp | Company | U.S. subsidiary of OnePlus, selling consumer Android smartphones across budget to flagship tiersSearch in Eureka ↗ |
| Plaintiff counsel | William P. Ramey , III | Attorney | Counsel for Mesa Digital, LLCSearch in Eureka ↗ |
| Plaintiff law firm | Ramey LLP | Law Firm | Representing Mesa Digital, LLCSearch in Eureka ↗ |
| Defendant counsel | Jack Shaw | Attorney | Counsel for One Plus USA CorpSearch in Eureka ↗ |
| Defendant counsel | Katherine R Hancock | Attorney | Counsel for One Plus USA CorpSearch in Eureka ↗ |
| Defendant law firm | Cantey Hanger LLP | Law Firm | Representing One Plus USA CorpSearch in Eureka ↗ |
| Defendant law firm | Procopio Cory Hargreaves & Savitch LLP | Law Firm | Representing One Plus USA CorpSearch in Eureka ↗ |
| Presiding judge | Judge Brantley Starr | Judge | Texas Northern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation is precise in its scope: dismissal is expressly with prejudice ‘as to the asserted patent,’ and cost-neutrality is mutual. The phrase ‘as to the asserted patent’ forecloses re-assertion of US9031537B2 specifically but is silent on related family members. The mutual cost-bearing clause, absent any Rule 54(d) or § 285 motion, suggests neither party sought to characterise the other’s position as objectively unreasonable — consistent with a negotiated exit rather than a merits defeat.
US9031537B2 — mobile wireless communication method and device technology
US9031537B2, filed under application number US12/257205, is a granted U.S. utility patent in the mobile wireless communications domain. The patent issued from an application filed in October 2008, giving it a priority date that predates the mass-market LTE and 5G smartphone era. Its claims are directed at methods and apparatus for wireless communication in mobile devices — a broad technical footprint that Mesa Digital sought to map across OnePlus’s entire product range from 2G-era designs through current 5G flagships.
The breadth of the accused product list — 22 models spanning OnePlus One through the OnePlus 11 5G and OnePlus Open — suggests Mesa Digital took the position that core wireless communication functionality common to all OnePlus Android devices fell within the patent’s claims. For competitors and suppliers operating in the Android smartphone supply chain, the scope of assertion underscores the continued enforcement risk posed by pre-LTE communication patents that may read on modern device implementations. A patent of this vintage, if valid, could present cross-industry exposure.
Should your product team run an FTO against US9031537B2?
Any company designing, importing, or distributing Android smartphones in the U.S. market should assess exposure to US9031537B2 and its patent family. The application date of 2008 and the wireless communication subject matter mean the claims could plausibly read on standard mobile connectivity features found across virtually all modern handsets. The dismissal with prejudice protects OnePlus USA specifically — it does not create any safe harbour for other device makers.
PatSnap Eureka’s FTO Search Agent can map US9031537B2’s independent claims against your product’s technical specifications, identify the full continuation and divisional family descending from US12/257205, and surface any related assertion activity across U.S. district courts. For procurement and R&D teams sourcing wireless modules or building 5G handsets, this analysis should be part of standard U.S. market entry diligence.
Run a freedom-to-operate analysis on US9031537B2 to assess your product’s exposure
Run FTO in Eureka →Similar smartphone patent infringement cases in N.D. Texas
Cases involving mobile wireless communication patents asserted against consumer smartphone makers in the Northern District of Texas before Judge Starr and related dockets.
What this case signals for the smartphone patent assertion landscape
A wide-net PAE assertion against 22 devices resolved in under a year — with finality. Here is what that pattern means.
With-prejudice outcomes are a meaningful PAE deterrent — document your defence posture
When a patent assertion entity agrees to dismiss with prejudice rather than without, it signals that the defendant’s litigation posture — claim construction arguments, invalidity contentions, or IPR threat — was credible enough to extract finality. Companies facing similar Ramey LLP filings should front-load invalidity analysis to achieve the same outcome.
Ramey LLP’s Texas filing pattern warrants proactive monitoring by mobile device companies
This filing is one of many by Ramey LLP in the Northern District of Texas targeting consumer electronics defendants. Companies with U.S. smartphone distribution should maintain a standing watch on new filings by this firm and on continuation applications descending from US9031537B2’s patent family to anticipate next-generation assertions.
Mesa v One — key questions answered
The with-prejudice dismissal under Rule 41(a)(1)(A)(ii) means Mesa Digital is permanently barred from reasserting US9031537B2 against One Plus USA Corp. It operates as a final judgment on the merits as to this defendant. However, the patent remains in force and Mesa Digital or any future assignee could assert it against different defendants not party to this stipulation.
The complaint accused 22 OnePlus models: OnePlus 6T, 7 Pro, 7T, 7T Pro 5G, 8 5G, 8T+ 5G, 9 5G, 9 Pro 5G, 10 Pro 5G, 10T 5G, 11 5G (three variants), Nord N10 5G, Nord N100 5G, Nord N20 5G, Nord N200 5G, Nord N30 5G, Nord N300 5G, OnePlus One, and the OnePlus Open (two variants). The breadth suggests the asserted claims target functionality common across the entire OnePlus Android portfolio.
Mesa Digital was represented by William P. Ramey III of Ramey LLP, a firm known for volume patent assertion filings in Texas courts. OnePlus USA was represented by Jack Shaw and Katherine R. Hancock of Cantey Hanger LLP and Procopio Cory Hargreaves & Savitch LLP. The case was assigned to Judge Brantley Starr in the Northern District of Texas.
US9031537B2 is a granted U.S. utility patent filed under application number US12/257205, with an application date in 2008. It covers methods and apparatus in the mobile wireless communications domain. Mesa Digital asserted it broadly across OnePlus’s smartphone range, suggesting claims directed at core wireless connectivity functionality common to modern Android handsets including 5G devices.
No. The with-prejudice dismissal is specific to One Plus USA Corp and extinguishes Mesa Digital’s claims against that entity only. Other smartphone manufacturers, distributors, or importers remain potentially exposed to assertion of US9031537B2 or related patents in the same family. Companies in the Android device supply chain should conduct independent FTO analysis rather than relying on this outcome as a sector-wide clearance.
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