Denneroll v. ChiroLux: Cervical Denneroll Patent Action Transferred to E.D. Washington
Denneroll Holdings and Denneroll Industries International filed suit against ChiroLux LLC in the Southern District of Texas, asserting US11419440B2 over the Cervical Denneroll spinal orthotic device. Within 93 days, the court granted a joint motion to transfer the case to the Spokane Division of the Eastern District of Washington, finding Texas to be an improper venue.
Improper Venue Ends Texas Phase of Denneroll Cervical Orthotic Dispute
On 21 February 2024, Denneroll Holdings Pty Ltd and Denneroll Industries International Pty Ltd — Australian entities holding rights to the Cervical Denneroll spinal orthotic — filed a patent infringement action against ChiroLux LLC in the Southern District of Texas (Case No. 4:24-cv-00595), asserting US11419440B2. The Cervical Denneroll device is a chiropractic orthotic designed to restore cervical lordosis, and the asserted patent covers its core structural and functional claims.
The case closed in Texas after just 93 days when both parties jointly moved to transfer the action to the Spokane Division of the Eastern District of Washington. Judge Charles Eskridge granted the transfer, concluding that Texas was an improper venue because ChiroLux had no regular and established place of business in the district — a threshold requirement under 28 U.S.C. § 1400(b) for patent infringement suits. The Eastern District of Washington, where ChiroLux could properly be sued, will now adjudicate the merits.
The speed of the transfer — fewer than three months — suggests that venue deficiency was apparent early in the litigation and that both sides recognised Washington as the correct forum, avoiding protracted venue motion briefing. The public record does not disclose any early settlement discussions or substantive rulings on infringement; those issues remain entirely open in the transferee court. The case illustrates how patent holders asserting rights in unfamiliar domestic venues face prompt challenge when the defendant lacks a qualifying presence under TC Heartland’s strict venue standard.
Filing to Case Transferred in 93 days
93 days in S.D. Texas before transfer — typical venue motions resolve in 90–180 days
Case transferred to E.D. Washington: what the move means for both parties
What a patent venue transfer actually means
Under 28 U.S.C. § 1400(b), a patent defendant may only be sued where it resides or has committed acts of infringement and maintains a regular, established place of business. Where a court finds venue is improper, it must dismiss or transfer. Here, both parties agreed Texas was the wrong forum and jointly moved to transfer to E.D. Washington — the action now continues there with no merits decided in Texas.
No merits ruling — case continuesDenneroll’s infringement claims survive — now in Washington
The transfer does not resolve or weaken Denneroll’s infringement claims under US11419440B2. All substantive issues — validity, claim scope, infringement by ChiroLux’s products, and damages — remain live in the Spokane Division. Denneroll accepted the Washington forum, suggesting the transferee court is commercially workable. The patent’s enforceability is unaffected by the venue change.
Claims fully preservedChiroLux litigates at home — but faces full merits exposure
ChiroLux secured a more convenient forum in the Eastern District of Washington, consistent with its operational base. However, the transfer resolves only the venue question: ChiroLux must still defend against infringement allegations covering the Cervical Denneroll device. Venue convenience may support stronger witness and evidence access, but it does not constitute a defence to the underlying patent claims.
Venue won, merits pendingVenue discipline is critical for chiropractic device patent enforcement
Following TC Heartland LLC v. Kraft Foods (2017), courts strictly enforce the patent venue statute. This transfer demonstrates that even joint agreement cannot retroactively cure improper filing. Patent holders in the chiropractic and spinal orthotic space should conduct venue due diligence — mapping a defendant’s registered offices and established places of business — before filing, to avoid wasted litigation spend and delay.
Pre-filing venue diligence essentialFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Denneroll Holdings Pty, Limited | Company | Australian chiropractic orthotic developer — holder of US11419440B2 (Cervical Denneroll)Search in Eureka ↗ |
| Co-Plaintiff | Denneroll Industries International Pty, Limited | Company | Search in Eureka ↗ |
| Defendant | ChiroLux LLC | Company | ChiroLux LLC — chiropractic product distributor based in the Eastern District of WashingtonSearch in Eureka ↗ |
| Plaintiff counsel | Michael Cole Mackey. | Attorney | Counsel for Denneroll Holdings Pty, LimitedSearch in Eureka ↗ |
| Plaintiff law firm | Mackey Law Firm PLLC | Law Firm | Representing Denneroll Holdings Pty, LimitedSearch in Eureka ↗ |
| Defendant counsel | John J. Edmonds | Attorney | Counsel for ChiroLux LLCSearch in Eureka ↗ |
| Defendant law firm | Edmonds & Schlather, PLLC | Law Firm | Representing ChiroLux LLCSearch in Eureka ↗ |
| Presiding judge | Judge Charles Eskridge | Judge | Texas Southern District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s transfer order is strictly procedural — it determines only that the Southern District of Texas was an improper venue under 28 U.S.C. § 1400(b), specifically because ChiroLux lacked a regular and established place of business in Texas. The order makes no finding on infringement, validity, or damages. The joint nature of the motion suggests both parties recognised the venue deficiency early, likely reducing adversarial costs at this stage, while leaving all substantive patent disputes entirely open for adjudication in the Spokane Division of the Eastern District of Washington.
US11419440B2 — Cervical Denneroll spinal orthotic device
US11419440B2, filed under application number US16/107840, protects the Cervical Denneroll — a chiropractic orthotic device engineered to apply sustained mechanical loading to the cervical spine to restore or improve cervical lordosis. The patent falls within the broader domain of spinal rehabilitation devices, a sector that combines biomechanical engineering with clinical chiropractic application. The technology addresses a well-documented clinical challenge: correcting anterior head carriage and hypolordosis without surgical intervention.
For competitors and distributors in the chiropractic and physical therapy device market, US11419440B2 represents a potentially broad exclusive right over a commercially active product category. Cervical orthotic devices that deliver postural correction through sustained loading may fall within the patent’s claim scope, depending on how the Eastern District of Washington construes the claims. Any company manufacturing, importing, or distributing similar cervical repositioning orthotics in the US should treat this patent as a live enforcement risk, particularly given that Denneroll has demonstrated willingness to litigate against US distributors.
Should you run an FTO analysis against US11419440B2?
Any manufacturer, importer, or distributor of cervical spine orthotic devices — particularly those designed to restore cervical lordosis through sustained mechanical loading — should assess freedom to operate against US11419440B2. With Denneroll actively litigating against a US distributor in federal court, the patent is demonstrated to be in enforcement mode. Companies selling similar cervical positioning devices through chiropractic, physical therapy, or direct-to-consumer channels in the US face material risk.
PatSnap Eureka’s FTO Search Agent allows IP teams and R&D leaders to map US11419440B2’s claim boundaries against your product specifications, identify prior art that may limit the patent’s scope, and benchmark design-around options. Eureka’s landscape view also surfaces related Denneroll patent families and any co-pending applications, giving your team a complete picture of the enforceability risk before committing to product launch or distribution agreements in the US market.
Run a freedom-to-operate analysis on US11419440B2 to assess your product’s exposure
Run FTO in Eureka →Similar Spinal Orthotic & Chiropractic Device Patent Cases
Cases involving spinal orthotic device patents in US district courts, including venue transfer disputes and cervical rehabilitation technology infringement actions.
What this case signals for the chiropractic device IP landscape
Venue missteps cost time and money even when both parties cooperate. This case offers practical lessons for orthotic and chiropractic patent enforcement.
TC Heartland compliance is non-negotiable — even in joint transfers
Both parties agreeing to transfer does not mean the original filing was harmless. Denneroll lost approximately three months of litigation time in Texas before the case reached its proper forum. Pre-filing venue analysis — confirming the defendant’s registered place of business and acts of infringement — is the minimum standard for competent patent enforcement strategy.
E.D. Washington is now the forum to watch for Cervical Denneroll patent risk
With the case transferred to the Spokane Division of the Eastern District of Washington, that court’s docket is where infringement, validity, and any damages ruling will emerge. Competitors and distributors of cervical orthotic products with any commercial nexus to the Pacific Northwest should monitor the Eastern District of Washington proceedings closely.
Denneroll v ChiroLux — key questions answered
Denneroll Holdings and Denneroll Industries International filed a patent infringement action against ChiroLux LLC in the Southern District of Texas, asserting US11419440B2 over the Cervical Denneroll spinal orthotic device. After 93 days, the court granted a joint motion to transfer the case to the Spokane Division of the Eastern District of Washington, finding Texas an improper venue because ChiroLux lacked a regular and established place of business there.
Under 28 U.S.C. § 1400(b), patent infringement suits must be filed where the defendant resides or has committed acts of infringement and maintains a regular, established place of business. Judge Eskridge found that ChiroLux had no regular and established place of business in the Southern District of Texas, making it an improper venue. Both parties jointly moved to transfer to the Eastern District of Washington, which was accepted as the proper forum.
US11419440B2 covers the Cervical Denneroll spinal orthotic device, which applies sustained mechanical loading to the cervical spine to restore cervical lordosis. It is commercially significant because it protects a product actively sold through chiropractic and physical therapy channels in the US. Companies distributing or manufacturing similar cervical repositioning devices may face infringement exposure, as Denneroll has demonstrated active enforcement intent through this litigation.
No. The transfer resolves only the venue question and has no bearing on the substantive merits of the case. All claims of infringement under US11419440B2 — including questions of claim scope, validity, and damages — remain fully live and will be adjudicated in the Spokane Division of the Eastern District of Washington. The patent’s enforceability is unaffected by the venue change.
Companies operating in the cervical orthotic and chiropractic device space should: (1) conduct an FTO analysis against US11419440B2 to assess whether their products fall within the patent’s claims; (2) monitor the Eastern District of Washington docket for claim construction and merits rulings; and (3) review their own venue exposure before filing or defending patent suits, given TC Heartland’s strict venue requirements. Pre-filing venue due diligence is essential to avoid costly procedural delays.
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