Spinelogik v. Choice Spine: Voluntary Dismissal in Spinal Fusion Patent Dispute

Case Overview

In a case that underscores the complex strategic calculus behind patent assertion in the medical device sector, Spinelogik, Inc. v. Choice Spine, LLC concluded not with a judicial ruling on the merits, but with a voluntary dismissal — one carrying significantly different legal consequences depending on which defendant faced the court’s final order.

Filed in the Eastern District of Texas on June 22, 2023, and closed February 9, 2026, this spinal fusion patent infringement action centered on U.S. Patent No. 8,460,385 — covering a fusion member for insertion between vertebral bodies. While the Member Case against Choice Spine, LLC was dismissed with prejudice, a companion Lead Case targeting Zimmer Biomet Holdings, Inc. and LDR Spine was dismissed without prejudice, leaving open questions about potential future assertion.

For patent attorneys, in-house IP counsel, and R&D teams operating in the orthopedic and spinal implant space, the outcome of Case No. 2:23-cv-00296 offers instructive lessons about litigation strategy, venue selection, and the procedural distinctions that can define a party’s long-term legal exposure.

The Parties

The Patent at Issue

This landmark case involved U.S. Patent No. 8,460,385 B1, covering a fusion member for insertion between vertebral bodies. This is a core technology used in spinal stabilization and fusion procedures, protecting ornamental appearance rather than functional technology.

• • US 8,460,385 B1 — Fusion member for insertion between vertebral bodies

The Verdict & Legal Analysis

Outcome

The case resolved through two Notices of Voluntary Dismissal filed by Plaintiff Spinelogik, Inc. pursuant to Federal Rule of Civil Procedure 41(a)(1)(A)(i):

• • Lead Case (Zimmer Biomet Holdings, Inc. and LDR Spine): Dismissed WITHOUT prejudice
• • Member Case (Choice Spine, LLC): Dismissed WITH prejudice

The Court accepted and acknowledged both Notices. All remaining pending requests for relief were denied as moot.

The Critical Distinction: With vs. Without Prejudice

The divergent dismissal terms are the most legally significant element of this outcome. A dismissal without prejudice preserves the plaintiff’s right to refile the same claims in a future action — subject to applicable statutes of limitations and any preclusion arguments. In practical terms, Spinelogik retains the ability to reassert its infringement claims against Zimmer Biomet and LDR Spine.

By contrast, dismissal with prejudice operates as a final adjudication on the merits. Spinelogik is permanently barred from bringing the same patent infringement claims against Choice Spine under U.S. Patent No. 8,460,385 B1. This outcome typically signals either a negotiated resolution (including a license or covenant not to sue) or a litigation calculus determining that continued assertion against this particular defendant was no longer strategically viable.

The strategic divergence between defendants is notable: one defendant group exits litigation with continued exposure; another achieves permanent resolution. This asymmetry frequently reflects differential settlement positions, varying degrees of product overlap with the asserted claims, or differing assessments of invalidity risk by the respective defense teams.