Clearfield v. NSI Industries: Fiber Optic Patent Suit Dismissed With Prejudice
Clearfield, Inc. asserted three U.S. patents covering Pushable/Pullable Bullet Fiber technology against NSI Industries and NSI-LYNN Electronics in the Western District of North Carolina. The parties jointly stipulated to dismissal with prejudice under Rule 41(a)(1)(A) after 296 days — a timeline consistent with pre-trial resolution.
Fiber optic patent dispute ends in stipulated final dismissal
Clearfield, Inc. filed this infringement action on 6 March 2024 in the U.S. District Court for the Western District of North Carolina (Case No. 3:24-cv-00282), asserting three patents — US9297976B2, US10007068B2, and US9678285B2 — against NSI Industries, LLC and its affiliate NSI-LYNN Electronics, LLC. The asserted patents relate to Pushable/Pullable Bullet Fiber technology, a product category used in fiber-to-the-premises and last-mile broadband deployment.
The case closed on 27 December 2024 when Clearfield filed a stipulation of dismissal with prejudice signed by all appearing parties, invoking Rule 41(a)(1)(A) of the Federal Rules of Civil Procedure. Dismissal with prejudice is a final disposition: Clearfield is permanently barred from reasserting the same claims against NSI Industries and NSI-LYNN Electronics on these three patents. The stipulated, all-party signature format typically signals a negotiated resolution, though no settlement terms are disclosed in the public record.
At 296 days, the case resolved well before any scheduled trial, suggesting the parties reached an accommodation without the cost and uncertainty of full litigation. What drove resolution — whether licensing terms, design-around by NSI, or a broader commercial arrangement — remains undisclosed. The with-prejudice designation is commercially significant: it closes the door on future re-litigation of these specific patent claims against these defendants, providing NSI Industries with a degree of certainty on its Pushable/Pullable Bullet Fiber product line.
Filing to Dismissed with Prejudice in 296 days
296 days — resolved before trial, shorter than the U.S. district court median for patent cases
Dismissed with prejudice: what the stipulated ruling means for both parties
Rule 41(a)(1)(A): a final, consent-based exit from litigation
A stipulated dismissal under Rule 41(a)(1)(A) requires signatures from all appearing parties, making it a consensual act rather than a unilateral withdrawal. The with-prejudice designation makes the dismissal operate as a final judgment on the merits for claim-preclusion purposes. Courts treat such filings as self-executing — no judicial order is required, and the case closes immediately upon filing.
Consent dismissal — self-executingClearfield surrenders future litigation rights on these patents vs. NSI
By agreeing to dismissal with prejudice, Clearfield permanently waives the right to sue NSI Industries and NSI-LYNN Electronics again on US9297976B2, US10007068B2, and US9678285B2 for the same accused conduct. This is a significant concession unless offset by a confidential licence, royalty stream, or commercial agreement. The public record does not confirm any such offset, but the all-party stipulation format strongly suggests a negotiated outcome rather than simple abandonment.
Re-litigation barred vs. these defendantsNSI Industries gains claim-preclusion protection on Bullet Fiber products
For NSI Industries and NSI-LYNN Electronics, dismissal with prejudice provides a meaningful litigation shield. Under claim preclusion doctrine, Clearfield cannot re-open this dispute on the same patents and accused products. NSI’s Pushable/Pullable Bullet Fiber product line benefits from this finality, reducing ongoing IP risk from Clearfield on these three patent numbers — though third-party patent holders or continuation patents from Clearfield could still present future exposure.
Claim preclusion — strong defendant protectionFiber access market: confidential terms leave competitive position unclear
Pushable/Pullable Bullet Fiber sits at the intersection of broadband infrastructure expansion and last-mile fiber deployment — a high-growth market segment. The confidential nature of any resolution terms means the competitive and licensing landscape for this technology remains opaque to market participants. Other companies commercialising similar push-pull fiber access products should note that Clearfield’s patent portfolio remains active and enforceable against non-parties to this dismissal.
Portfolio remains live vs. third partiesFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Clearfield | Individual | Fiber optic equipment manufacturer — holder of US9297976B2, US10007068B2 & US9678285B2Search in Eureka ↗ |
| Defendant | NSI Industries, LLC | Company | NSI Industries, LLC & NSI-LYNN Electronics, LLC — electrical and fiber connectivity product distributorsSearch in Eureka ↗ |
| Co-Defendant | NSI-LYNN Electronics, LLC | Company | Search in Eureka ↗ |
| Plaintiff counsel | Alison McCarthy | Attorney | Counsel for ClearfieldSearch in Eureka ↗ |
| Plaintiff counsel | Griffin Mesmer | Attorney | Counsel for ClearfieldSearch in Eureka ↗ |
| Plaintiff counsel | Jason D. Evans | Attorney | Counsel for ClearfieldSearch in Eureka ↗ |
| Plaintiff law firm | Troutman Pepper Hamilton Sanders LLP | Law Firm | Representing ClearfieldSearch in Eureka ↗ |
| Defendant counsel | David J. Silvia | Attorney | Counsel for NSI Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | Jacob Alexander | Attorney | Counsel for NSI Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | James M. Bollinger | Attorney | Counsel for NSI Industries, LLCSearch in Eureka ↗ |
| Defendant counsel | Russ Ferguson | Attorney | Counsel for NSI Industries, LLCSearch in Eureka ↗ |
| Defendant law firm | McCarter & English LLP | Law Firm | Representing NSI Industries, LLCSearch in Eureka ↗ |
| Defendant law firm | Womble Bond Dickinson (US) LLP | Law Firm | Representing NSI Industries, LLCSearch in Eureka ↗ |
| Presiding judge | Judge N/A | Judge | North Carolina Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The verdict text invokes Rule 41(a)(1)(A) with an explicit with-prejudice designation and confirms all appearing parties signed the stipulation. This phrasing is legally precise: the with-prejudice qualifier elevates a standard voluntary dismissal to a claim-preclusive final disposition, foreclosing any future action by Clearfield against these defendants on the same patent claims. The all-party signature requirement distinguishes this from a unilateral plaintiff withdrawal and is broadly consistent with a negotiated resolution, though no commercial terms are publicly disclosed.
US9297976B2, US10007068B2 & US9678285B2 — Pushable/Pullable Bullet Fiber patents
The three asserted patents — US9297976B2 (App. No. 14/078449), US10007068B2 (App. No. 15/618973), and US9678285B2 (App. No. 15/049274) — cover technology associated with Pushable/Pullable Bullet Fiber, a fiber optic access solution designed for installation in pre-existing conduit infrastructure without specialised tooling. The sequential application numbers suggest a multi-generation prosecution strategy, with each subsequent application potentially broadening or refining claim scope around the core deployment mechanism.
Pushable/Pullable Bullet Fiber technology is commercially significant in the context of accelerating broadband infrastructure rollout, where installers require low-friction, rapid-deployment fiber solutions for last-mile and premises connectivity. Clearfield’s decision to assert three patents simultaneously against NSI Industries suggests the company views this patent family as a core competitive differentiator. For market participants developing or distributing similar fiber access products, the active status of this portfolio — and the potential for continuation patents — represents an ongoing freedom-to-operate consideration.
Should your product team run an FTO against Clearfield’s Bullet Fiber patents?
Any company designing, manufacturing, importing, or distributing push-pull fiber optic access products for conduit-based last-mile deployment should treat US9297976B2, US10007068B2, and US9678285B2 as live FTO concerns. The with-prejudice dismissal binds only NSI Industries and NSI-LYNN Electronics — it does not extinguish these patents or limit Clearfield’s ability to assert them against other parties. New market entrants in the fiber-to-the-premises and broadband infrastructure segments are particularly exposed.
PatSnap Eureka’s FTO Search Agent can map your product’s technical features against the independent claims of all three Clearfield patents, identify prosecution history file wrappers for claim-scope narrowing arguments, and surface any continuation or divisional applications that may present future risk. Running a structured FTO now — before commercial launch — is substantially less costly than defending an infringement action in W.D.N.C. or a comparable venue.
Run a freedom-to-operate analysis on US9297976B2 to assess your product’s exposure
Run FTO in Eureka →Similar fiber optic patent infringement cases in U.S. district courts
Explore comparable patent infringement disputes involving fiber optic access and connectivity technology litigated in U.S. district courts, with similar assertion and resolution patterns.
What this case signals for the fiber optic connectivity IP landscape
Three asserted patents, two defendants, and a with-prejudice exit in under a year — the pattern is worth unpacking for fiber IP stakeholders.
With-prejudice stipulations within 10 months typically signal settlement
When both parties sign a Rule 41(a)(1)(A) dismissal with prejudice this early in a patent case, and before any substantive court ruling, the pattern is strongly consistent with a confidential licensing or commercial resolution. IP teams monitoring Clearfield’s enforcement posture should treat this as an active licensing programme, not an abandoned claim.
Clearfield’s three-patent assertion strategy signals a broad claim perimeter
Asserting three patents covering related Pushable/Pullable Bullet Fiber technology simultaneously is a common approach to raise claim-construction complexity and settlement leverage. Companies competing in push-pull fiber access products — particularly those launching new SKUs — should audit all three patent numbers against their own product designs before market entry.
Clearfield v NSI — key questions answered
Dismissal with prejudice in this case means Clearfield, Inc. is permanently barred from re-filing the same patent infringement claims — based on US9297976B2, US10007068B2, and US9678285B2 — against NSI Industries and NSI-LYNN Electronics. The dismissal operates as a final judgment on the merits for claim-preclusion purposes, even though no trial took place. It does not affect Clearfield’s ability to enforce the same patents against unrelated third parties.
Clearfield asserted three U.S. patents: US9297976B2 (Application No. 14/078449), US10007068B2 (Application No. 15/618973), and US9678285B2 (Application No. 15/049274). All three patents relate to Pushable/Pullable Bullet Fiber technology used in conduit-based fiber optic deployment for last-mile broadband infrastructure.
The public record does not confirm a settlement. However, the case was dismissed with prejudice via a stipulation signed by all appearing parties under Rule 41(a)(1)(A) — a format that is broadly consistent with a negotiated resolution. No financial terms, licence agreements, or commercial arrangements have been publicly disclosed. The with-prejudice designation suggests the parties reached a final understanding rather than Clearfield simply abandoning its claims.
Pushable/Pullable Bullet Fiber is a fiber optic cable product designed to be installed through pre-existing conduit without specialised pulling equipment, enabling faster and lower-cost last-mile broadband deployment. Clearfield holds multiple patents on this technology and alleged that NSI Industries and NSI-LYNN Electronics infringed those patents. The technology is commercially significant given ongoing broadband infrastructure expansion across the U.S.
Yes. The with-prejudice dismissal in Case No. 3:24-cv-00282 is specific to NSI Industries, LLC and NSI-LYNN Electronics, LLC. It does not extinguish or invalidate US9297976B2, US10007068B2, or US9678285B2. Clearfield retains full enforcement rights against any other party — including competitors, distributors, or importers — who may be using technology covered by these patents. Companies in the fiber access product market should conduct FTO analysis accordingly.
PatSnap Eureka searches patents and litigation data to answer instantly.