Iarnach Technologies v. Verizon: Five Fiber-Optic Patents Dismissed Without Prejudice
Iarnach Technologies Ltd. filed suit against seven Verizon entities in the Eastern District of Texas, asserting five patents covering NG-PON2 fiber-optic network architecture and OpenOMCI interoperability. After 440 days of litigation before Judge Rodney Gilstrap, all claims were dismissed without prejudice — leaving the door open for future enforcement.
A five-patent fiber-optic salvo against Verizon ends quietly — for now
On December 28, 2023, Iarnach Technologies Ltd. filed a patent infringement complaint in the Eastern District of Texas against Verizon Communications Inc. and six affiliated Verizon entities, including Cellco Partnership d/b/a Verizon Wireless and Verizon Business Network Services LLC. The complaint asserted five US patents — US8942378B2, US8934359B2, US8712242B2, US9363013B2, and US9806892B2 — all directed at fiber-optic network technology, specifically NG-PON2 deployments and the OpenOMCI framework enabling third-party ONT vendor interoperability in Verizon’s fiber networks.
The case closed on March 12, 2025, when the parties filed a Joint Stipulation of Partial Dismissal Without Prejudice under Federal Rule of Civil Procedure 41(a)(1)(A)(ii). Judge Rodney Gilstrap accepted and acknowledged the stipulation, ordering all claims and causes of action dismissed without prejudice, with each side bearing its own legal costs. The dismissal without prejudice means Iarnach retains the right to refile these claims — potentially in the same or a different forum — subject to any applicable statute of limitations.
At 440 days, the case ran through substantial pretrial activity before resolving, suggesting the parties likely engaged in claim construction positioning, discovery, and possibly licensing discussions before reaching this outcome. The ‘own costs’ fee allocation and the without-prejudice framing are consistent with a negotiated resolution rather than a unilateral capitulation by either side. What remains unknown from the public record is whether any licensing agreement, covenant not to sue, or commercial arrangement was reached between Iarnach and Verizon that precipitated the stipulated dismissal.
Filing to Dismissed without Prejudice in 440 days
440 days — longer than the median E.D. Texas patent case terminated pre-trial
Dismissed without prejudice: what the stipulation means for both parties
Rule 41(a)(1)(A)(ii) dismissal — no merits ruling issued
A stipulated dismissal under Rule 41(a)(1)(A)(ii) requires consent from all parties who have appeared. It terminates the action without any adjudication of patent validity or infringement. The court made no finding on the merits of Iarnach’s five NG-PON2 patents. The ‘without prejudice’ designation preserves Iarnach’s right to refile the same claims in a future action, unlike a dismissal with prejudice which would bar re-litigation.
No merits adjudicationIarnach retains full enforcement rights across all five patents
Dismissal without prejudice leaves Iarnach’s patent portfolio legally intact and unimpaired. None of the five asserted patents — covering NG-PON2 architecture and OpenOMCI interoperability — were found invalid or non-infringed. Iarnach may refile against Verizon or assert the same patents against other fiber-optic network operators. The fee-neutral outcome suggests neither party extracted a clear litigation advantage, consistent with a negotiated resolution.
Patents remain enforceableVerizon avoids an adverse judgment — but gains no invalidity shield
Verizon and its six affiliated entities are dismissed from this action without incurring a damages award or injunction. However, because there was no validity or non-infringement ruling, Verizon cannot use this outcome as a defence in any future enforcement action by Iarnach. The without-prejudice dismissal provides no estoppel protection. Verizon’s NG-PON2 deployments and OpenOMCI ecosystem partners remain potentially exposed to future patent claims.
No estoppel protectionThird-party ONT vendors and fiber operators should monitor Iarnach’s portfolio
The product scope — NG-PON2 networks and OpenOMCI-compliant third-party ONT devices — extends beyond Verizon to any operator deploying next-generation passive optical networks. Companies building or supplying interoperable ONT hardware for fiber-optic infrastructure should treat this dismissal as a pause, not a resolution. Iarnach’s five-patent portfolio remains active, and the without-prejudice exit suggests continued licensing or enforcement activity is plausible.
Sector-wide exposure persistsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Iarnach Technologies, Ltd. | Company | Fiber-optic network IP licensor — holder of US8942378B2 and four related NG-PON2 patentsSearch in Eureka ↗ |
| Defendant | Verizon Communications, Inc. | Company | Verizon Communications Inc. and six affiliated entities operating US fiber-optic network infrastructureSearch in Eureka ↗ |
| Co-Defendant | Verizon Business Global, LLC | Company | Search in Eureka ↗ |
| Co-Defendant | Verizon Data Services, LLC | Company | Search in Eureka ↗ |
| Co-Defendant | Verizon Services, Corp. | Company | Search in Eureka ↗ |
| Co-Defendant | Verizon Enterprise Solutions, LLC | Company | Search in Eureka ↗ |
| Co-Defendant | Cellco Partnership, (dba Verizon Wireless) | Individual | Search in Eureka ↗ |
| Co-Defendant | Verizon Business Network Services, LLC | Company | Search in Eureka ↗ |
| Plaintiff counsel | Alden Harris | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Amir H. Alavi | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Andrea Leigh Fair | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Blaine Andrew Larson | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Christopher Ryan Pinckney | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Demetrios Anaipakos | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Eric James Enger | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Lily Rebecca Glick | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Masood Anjom | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Michael Dean McBride | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Michael F. Heim | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Robert Allan Bullwinkel | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff counsel | Steven Thomas Jugle | Attorney | Counsel for Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Alavi & Anaipakos PLLC | Law Firm | Representing Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Heim Payne & Chorush LLP | Law Firm | Representing Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Plaintiff law firm | Miller Fair Henry PLLC | Law Firm | Representing Iarnach Technologies, Ltd.Search in Eureka ↗ |
| Defendant counsel | Deron R. Dacus | Attorney | Counsel for Verizon Communications, Inc.Search in Eureka ↗ |
| Defendant counsel | Ross Ritter Barton | Attorney | Counsel for Verizon Communications, Inc.Search in Eureka ↗ |
| Defendant law firm | Alston & Bird LLP | Law Firm | Representing Verizon Communications, Inc.Search in Eureka ↗ |
| Defendant law firm | The Dacus Firm PC | Law Firm | Representing Verizon Communications, Inc.Search in Eureka ↗ |
| Presiding judge | Judge Rodney Gilstrap | Judge | Texas Eastern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The stipulation’s language — that it ‘resolves all remaining disputes in this litigation’ — is notable because the dismissal was framed as ‘partial’ in the filing title yet the court order dismisses all claims and causes of action. This suggests the parties may have resolved certain matters outside the court record before filing. The Rule 41(a)(1)(A)(ii) mechanism requires mutual consent, confirming Verizon’s active participation in the exit. No merits finding was made on any of the five NG-PON2 patents, preserving the full enforcement landscape for future proceedings.
US8942378B2 — NG-PON2 fiber-optic network architecture and OpenOMCI interoperability
The five asserted patents — US8942378B2, US8934359B2, US8712242B2, US9363013B2, and US9806892B2 — form a patent family directed at next-generation passive optical network (NG-PON2) technology, covering wavelength management, optical network termination (ONT) registration, upstream/downstream tuning, and the OpenOMCI management and control interface framework. The application numbers span US13 and US14 series filings, indicating a prosecution history that tracks the evolution of NG-PON2 standards over multiple years. This multi-generational filing strategy is consistent with a portfolio designed to capture both foundational protocol claims and implementation-level refinements.
NG-PON2 is the ITU-T standard backbone for next-generation fiber-to-the-premises deployments, and Verizon’s OpenOMCI framework is specifically designed to enable multi-vendor ONT interoperability at scale. A patent portfolio asserting rights in this space carries strategic significance well beyond any single defendant: any operator or equipment supplier deploying ITU-T G.989-compliant infrastructure — including Nokia, Calix, and other ONT manufacturers — may sit within the potential reach of Iarnach’s claims. The dismissal without prejudice does nothing to narrow the technical scope of these patents.
Should you run an FTO against US8942378B2 and the Iarnach NG-PON2 portfolio?
If your organisation designs, manufactures, or deploys NG-PON2 optical line terminals, ONT devices, or OpenOMCI-compliant management software, this five-patent portfolio warrants formal FTO analysis. The claims are directed at the foundational protocols governing how next-generation fiber networks assign wavelengths, register terminals, and manage multi-vendor interoperability — functions that are difficult to design around without departing from ITU-T G.989 compliance. Equipment vendors supplying to Verizon or comparable carriers are particularly exposed given the explicit product framing in the complaint.
PatSnap Eureka’s FTO Search Agent can map each of the five Iarnach patent claims against your product’s technical implementation, identify prosecution history estoppel that may limit claim scope, and flag continuations or divisionals that could extend the portfolio’s reach. Given the without-prejudice dismissal, proactive FTO clearance now — before any refiling — is the lowest-cost risk mitigation available to fiber-optic network operators and ONT suppliers.
Run a freedom-to-operate analysis on US8942378B2 to assess your product’s exposure
Run FTO in Eureka →Similar NG-PON2 and fiber-optic network patent cases in E.D. Texas
Cases involving fiber-optic network patents and NG-PON2 infrastructure before Judge Gilstrap in the Eastern District of Texas show recurring patterns in resolution timelines and licensing outcomes.
What this case signals for the fiber-optic and NG-PON2 IP landscape
Five patents, seven defendants, 440 days — and a quiet exit. The unresolved enforcement story warrants close monitoring by fiber network operators and ONT vendors.
Without-prejudice exits from E.D. Texas often signal a parallel licensing track
When a plaintiff in E.D. Texas files a multi-entity infringement suit, then stipulates dismissal without prejudice at the own-costs split, it is frequently consistent with a negotiated licensing arrangement or a covenant not to sue. Companies operating NG-PON2 infrastructure should check whether any Iarnach license disclosure accompanies this resolution.
Judge Gilstrap’s docket creates settlement pressure — even for complex network patent cases
The Eastern District of Texas under Judge Gilstrap is among the most active patent venues in the US. The 440-day duration suggests both sides engaged substantively before settling. Defendants in similar multi-patent fiber-optic suits before Gilstrap should anticipate accelerated claim construction schedules that compress settlement timelines.
Iarnach v Verizon — key questions answered
Iarnach Technologies asserted five patents: US8942378B2, US8934359B2, US8712242B2, US9363013B2, and US9806892B2. All five are directed at NG-PON2 fiber-optic network technology, covering wavelength management, ONT registration, upstream/downstream tuning, and the OpenOMCI management interface framework used in Verizon’s fiber network deployments.
The case was dismissed without prejudice pursuant to a Joint Stipulation filed by all parties under Federal Rule of Civil Procedure 41(a)(1)(A)(ii). The stipulation stated it ‘resolves all remaining disputes in this litigation.’ No merits ruling was issued. A without-prejudice dismissal means Iarnach retains the right to refile the same claims in future litigation, and no invalidity or non-infringement determination was made on any of the five patents.
Yes. A dismissal without prejudice does not bar refiling, subject to applicable statutes of limitations. Because no court made a validity or infringement finding, Iarnach’s five NG-PON2 patents remain fully enforceable. Verizon has no estoppel protection from this outcome, meaning the same claims could be reasserted in the same or a different forum.
OpenOMCI (Open ONT Management and Control Interface) is Verizon’s open-source framework enabling third-party ONT (optical network terminal) vendors to develop interoperable devices for deployment in Verizon’s NG-PON2 fiber-optic networks. The Iarnach complaint targeted Verizon’s NG-PON2 deployments and the OpenOMCI ecosystem specifically, suggesting the asserted patents cover management and control interface protocols central to multi-vendor fiber network interoperability.
Seven Verizon entities were named as defendants: Verizon Communications Inc., Verizon Business Global LLC, Verizon Data Services LLC, Verizon Services Corp., Verizon Enterprise Solutions LLC, Cellco Partnership d/b/a Verizon Wireless, and Verizon Business Network Services LLC. All seven entities were dismissed without prejudice under the joint stipulation filed March 12, 2025.
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