Trademark Dilution by Blurring and Tarnishment Under the Lanham Act

## Dilution protects a narrow class of marks

Traditional trademark infringement focuses on likely consumer confusion. Federal **trademark dilution** protects famous marks from uses that impair distinctiveness or harm reputation even without likely confusion, competition, or actual economic injury.

The remedy is intentionally limited. A mark must be widely recognized by the general consuming public of the United States as identifying a single source. Fame within a city, profession, or niche market is ordinarily insufficient.

Courts evaluate duration and extent of use, advertising and publicity, geographic reach, sales, actual recognition, and federal registration. The plaintiff’s mark must have become famous before the defendant began the challenged use.

## From Victoria’s Secret to the TDRA

In *Moseley v. V Secret Catalogue, Inc.*, the Supreme Court interpreted the earlier statute to require proof of actual dilution. Congress responded with the Trademark Dilution Revision Act of 2006, which permits relief upon a **likelihood of dilution**.

The revised statute identifies two principal theories: dilution by blurring and dilution by tarnishment. The Supreme Court’s earlier decision remains historically important, but claims arising under current law are governed by the revised standard.

## Dilution by blurring

Blurring is an association arising from similarity between marks that impairs the famous mark’s distinctiveness. Courts may consider:

- The degree of similarity; - The famous mark’s inherent or acquired distinctiveness; - The owner’s substantially exclusive use; - The degree of recognition; - Whether the defendant intended to create an association; and - Evidence of actual association.

Association alone is not enough. The association must likely weaken the famous mark’s ability to identify a unique source. Evidence can include surveys, marketing context, consumer reactions, and the proliferation of similar uses.

## Dilution by tarnishment

Tarnishment is an association that harms the reputation of the famous mark. Claims often involve allegedly unsavory, low-quality, dangerous, or offensive contexts. A trademark owner cannot establish tarnishment merely by disliking criticism or parody.

The statute excludes certain fair uses, including parody, criticism, and commentary when used other than as a designation of source for the user’s own goods or services. News reporting, news commentary, and noncommercial use also receive statutory protection. The source-identifying manner of use can therefore be decisive.

## Digital-age applications

Online disputes may involve domain names, social handles, hashtags, virtual goods, app icons, influencer content, or metaverse storefronts. The medium does not eliminate statutory elements. Courts still ask whether the defendant is using a sufficiently similar designation, whether the plaintiff’s mark meets the national-fame threshold, and whether an exclusion applies.

Search-engine visibility or virality does not automatically prove dilution. Screenshots should preserve context, dates, audience reach, purchasing pathways, disclaimers, and changes over time. Domain-name disputes may also implicate the Anti-cybersquatting Consumer Protection Act, which has different elements.

## Remedies and risk management

Injunctive relief is the usual remedy. Monetary relief may become available when statutory conditions, including willfulness requirements applicable to certain claims, are met. Defendants may also challenge fame, priority, similarity, likely impairment, and the asserted exclusion.

Owners should maintain recognition evidence and enforce consistently without converting dilution into a general right to suppress unfavorable speech. Businesses clearing a new mark should search beyond identical names and consider famous marks in unrelated markets.

*By Thomas Bergmann, Esq. This article provides general information, not legal advice.*