NOSSK vs. TRX: Suspension Trainer Patent Battle Dismissed in California

Case Overview

When a smaller fitness equipment manufacturer files a declaratory judgment action against one of the most recognizable brands in the suspension training market, the strategic calculus is immediately apparent. In *NOSSK, Inc. v. Fitness Anywhere, LLC* (Case No. 5:21-cv-08914), NOSSK sought judicial clarity against TRX — the company that popularized suspension bodyweight training — across five distinct patents covering suspension fitness trainer technology.

Filed in the Northern District of California on November 17, 2021, and ultimately dismissed without prejudice on November 14, 2025, this nearly four-year suspension training patent litigation offers a richly instructive case study in declaratory judgment strategy, patent portfolio defense, and litigation risk management.

The Parties

Patents at Issue

This case involved five United States patents covering suspension fitness trainer technology, representing a layered portfolio spanning foundational to refined suspension training technology:

• • US7090622B2 — Suspension-based exercise system fundamentals
• • US5556369A — Early foundational claims in resistance/bodyweight training apparatus
• • US8083653B2 — Advanced suspension trainer configurations
• • US6921354B1 — Adjustable suspension training device mechanics
• • US7806814B2 — Additional suspension training system claims

For patent attorneys, IP professionals, and R&D leaders in the fitness and sporting goods sectors, the outcome — and notably the manner of its resolution — carries meaningful lessons about how smaller market entrants can challenge dominant patent portfolios and what that means for freedom-to-operate analysis in the wearable fitness equipment space.

The Verdict & Legal Analysis

Outcome

The case was dismissed without prejudice, meaning no final adjudication on the merits was reached. No damages were awarded, and no injunctive relief was granted or denied on substantive grounds. The specific procedural mechanism triggering dismissal — whether voluntary, stipulated, or court-ordered — was not disclosed in available public records. Practitioners should consult PACER (Case No. 5:21-cv-08914) for full docket access.

Key Legal Issues

NOSSK’s filing as **plaintiff seeking declaratory judgment** rather than waiting to be sued is the defining strategic feature of this case. Under the *Declaratory Judgment Act* (28 U.S.C. § 2201), a party facing a reasonable apprehension of patent suit may proactively seek a court declaration of non-infringement or invalidity.

By filing in the Northern District of California, NOSSK exercised meaningful litigation control. This offensive posture is increasingly common when patent holders with large portfolios engage in pre-litigation licensing campaigns against smaller competitors. The five-patent scope signals that NOSSK likely faced assertions touching multiple aspects of its product design across several patent families.