Helical LLC v. OnePlus Technology: Ear Device Patent Suit Dismissed With Prejudice
Helical LLC filed a patent infringement action against OnePlus Technology (Shenzhen) in the Eastern District of Texas, asserting US9445183B2 covering a sound system with an ear device featuring improved fit and sound. The case was voluntarily dismissed with prejudice in just 105 days, with each party bearing its own costs — a resolution that permanently forecloses Helical from reasserting the same claims against OnePlus.
Early dismissal with prejudice ends Helical’s ear device patent action
On April 9, 2025, Helical LLC filed suit against OnePlus Technology (Shenzhen) Co., Ltd. in the United States District Court for the Eastern District of Texas (Case No. 2:25-cv-00360), alleging patent infringement of US9445183B2. The asserted patent covers a sound system with an ear device designed for improved fit and sound — a technology directly relevant to OnePlus’s consumer audio product line. Helical was represented by Rabicoff Law LLC, a firm with a notable track record in NPE assertion campaigns.
The case closed on July 23, 2025, a mere 105 days after filing, when Helical filed a Notice of Voluntary Dismissal with prejudice under Rule 41(a)(1)(A)(i). The Court accepted and acknowledged the notice, formally dismissing all pending claims with prejudice and denying all remaining relief requests as moot. Critically, each party was ordered to bear its own costs, expenses, and attorneys’ fees, suggesting the parties reached an understanding without a formal damages award or license payment entering the public record.
The speed of resolution — 105 days from filing to dismissal — and the with-prejudice designation are analytically significant. A dismissal with prejudice at this stage, before any answer or substantive motion practice from the defendant appears on the docket, suggests either a private settlement or licensing arrangement, or a decision by Helical to abandon the claim following a pre-litigation assessment of infringement or validity. The financial terms, if any, remain confidential. What is certain is that Helical cannot reassert these specific claims against OnePlus on this patent.
Filing to Dismissed with Prejudice in 105 days
105 days — resolved well before the E.D. Texas median time to trial
Dismissed with prejudice: what the voluntary exit means for both parties
Rule 41(a)(1)(A)(i): the plaintiff’s right to exit — but at a cost
Rule 41(a)(1)(A)(i) permits a plaintiff to voluntarily dismiss without a court order before the defendant serves an answer or a motion for summary judgment. Here, Helical invoked this right but chose to dismiss with prejudice — a critical distinction. A with-prejudice dismissal operates as a final adjudication on the merits, permanently barring Helical from re-filing the same claims against OnePlus on US9445183B2.
Final — no re-filing permittedHelical loses the right to reassert — but retains the patent
By dismissing with prejudice, Helical permanently surrendered its infringement claims against OnePlus on US9445183B2. The patent itself remains in force and Helical may still assert it against other defendants. The decision to accept with-prejudice terms at this early stage — before OnePlus even filed an answer — suggests Helical may have received a licensing payment or concluded infringement could not be established. The public record does not confirm either.
Patent survives — OnePlus claim extinguishedOnePlus exits cleanly — no fee award, no public admission
OnePlus secured a dismissal with prejudice without filing an answer, paying a publicly disclosed damages award, or making any admission of infringement. The each-party-bears-own-costs order means OnePlus received no fee recovery under 35 U.S.C. § 285, even though the early exit might otherwise support an exceptional case argument. OnePlus’s audio products are effectively insulated from further action by Helical on this specific patent.
Clean exit — no § 285 fee awardNPE assertion patterns in consumer audio: early exits remain common
This case is consistent with a broader pattern in which NPEs assert audio and wearable technology patents in E.D. Texas to extract early licensing payments, with dismissals following quickly when defendants resist or negotiate. The absence of any substantive motion practice or claim construction proceedings limits any precedential impact on the validity or scope of US9445183B2. Other consumer audio companies should note that the patent remains active and enforceable against third parties.
Patent still live vs. other defendantsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Helical LLC | Company | Patent assertion entity — holder of US9445183B2 (ear device sound system)Search in Eureka ↗ |
| Defendant | OnePlus Technology (Shenzhen) Co., Ltd. | Company | OnePlus Technology (Shenzhen) Co., Ltd. — Chinese consumer electronics manufacturerSearch in Eureka ↗ |
| Plaintiff counsel | Isaac Phillip Rabicoff | Attorney | Counsel for Helical LLCSearch in Eureka ↗ |
| Plaintiff law firm | Rabicoff Law LLC | Law Firm | Representing Helical LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order accepting Helical’s Rule 41(a)(1)(A)(i) notice and dismissing with prejudice is procedurally straightforward but commercially significant. The with-prejudice designation means the dismissal carries res judicata effect as between Helical and OnePlus on US9445183B2 — Helical is permanently barred from relitigating these infringement claims. The each-party-bears-own-costs provision is notable: it forecloses any § 285 exceptional case fee recovery by OnePlus, suggesting the defendant prioritised a clean exit over a potentially protracted fee motion. No merits determination was made.
US9445183B2 — Ear device with improved fit and sound system
US9445183B2, filed under application number US14/665556, protects a sound system incorporating an ear device engineered for improved physical fit and audio performance. The patent sits within the consumer audio and wearable acoustic technology domain — a segment that has seen intense commercial activity driven by the proliferation of true wireless stereo (TWS) earbuds, hearables, and smart ear devices. The ‘B2’ designation confirms the patent issued with at least one round of examination, and it remains in force as an enforceable US utility patent.
Strategically, US9445183B2 occupies a space where consumer electronics giants, audio specialists, and emerging wearable companies converge. OnePlus’s inclusion as a defendant signals the patent holder’s view that modern TWS or in-ear product architectures fall within the claim scope. For competitors in the ear device and hearable market — from premium audio brands to smartphone OEMs shipping bundled earbuds — this patent represents an active litigation risk. The absence of any invalidity challenge or claim construction ruling means its scope remains undetermined by any court.
Should your audio product team run an FTO against US9445183B2?
Any company designing, manufacturing, or importing ear devices — including TWS earbuds, hearing aids, hearables, sports earphones, or bundled smartphone audio accessories — into the US market should assess exposure against US9445183B2. The patent’s focus on fit optimisation and sound system architecture means structural or ergonomic design choices, not just audio processing, may be relevant to infringement. Given Helical’s demonstrated willingness to assert in E.D. Texas, the litigation cost of not conducting an FTO is asymmetric.
PatSnap Eureka’s FTO Search Agent enables R&D and IP teams to run structured freedom-to-operate searches against US9445183B2 claim by claim — mapping your product’s technical features against the patent’s independent and dependent claims. Eureka surfaces prior art, identifies design-around options, and highlights any post-grant proceedings that may affect claim validity. Teams can also monitor Helical LLC’s assertion portfolio to receive alerts if new patents or defendants emerge in this technology space.
Run a freedom-to-operate analysis on US9445183B2 to assess your product’s exposure
Run FTO in Eureka →Similar ear device and consumer audio patent cases in E.D. Texas
Explore comparable NPE patent infringement actions in the consumer audio and ear device sector filed in the Eastern District of Texas federal court.
What this case signals for the consumer audio IP landscape
A 105-day NPE assertion cycle in E.D. Texas with a with-prejudice exit reveals both litigation economics and patent risk for audio hardware makers.
US9445183B2 remains fully enforceable against other audio device makers
The with-prejudice dismissal only bars Helical’s claims against OnePlus. Every other manufacturer of ear devices — including TWS earbud, hearing aid, and hearable product makers — faces the same exposure on US9445183B2. Companies shipping ear device products in the US should treat this patent as an active assertion risk, particularly given Helical’s willingness to file in E.D. Texas.
E.D. Texas NPE economics favour early resolution before answer
The fact that this case closed before OnePlus filed any responsive pleading suggests the assertion economics were resolved in the pre-answer window. Companies facing similar Helical or Rabicoff Law LLC filings should anticipate a short negotiation window — typically under 120 days — before the plaintiff moves to substantive proceedings or settles. Budget and response strategy should be calibrated accordingly.
Helical v OnePlus — key questions answered
Dismissed with prejudice means Helical LLC permanently forfeited its right to re-file the same infringement claims against OnePlus on US9445183B2. The court accepted Helical’s voluntary notice under Rule 41(a)(1)(A)(i) and entered a final dismissal. Helical retains the patent and may assert it against other parties, but OnePlus is insulated from further action by Helical on this specific patent.
Helical LLC asserted US9445183B2, filed as application US14/665556, covering a sound system with an ear device designed for improved fit and sound. The patent relates to consumer audio hardware — specifically the physical and acoustic design of ear-worn audio devices — directly relevant to OnePlus’s consumer electronics product portfolio.
The public record does not disclose the reason. A with-prejudice voluntary dismissal at this early stage — before OnePlus filed any responsive pleading — is consistent with a private licensing agreement or settlement, or alternatively a plaintiff determination that infringement or validity arguments were unlikely to succeed. The financial terms, if any existed, are not publicly available.
No. Because the case was dismissed before any substantive motions, claim construction, or merits adjudication, there is no judicial determination regarding the validity, scope, or enforceability of US9445183B2. The patent remains fully in force and can be asserted by Helical against other defendants in the consumer audio and ear device market.
Rabicoff Law LLC, represented by attorney Isaac Phillip Rabicoff, acted as plaintiff’s counsel for Helical LLC. The firm is associated with NPE patent assertion activities, particularly in the technology sector. Their involvement in a fast-moving E.D. Texas filing that resolved within 105 days is consistent with a pre-litigation licensing or early settlement strategy characteristic of NPE assertion campaigns.
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