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How Can Prior Use Defense Protect You in Trademark Litigation?

Law Offices of David H. Schwartz, INC. Dec. 17, 2024

Trademark litigation can be a tough battle for businesses, especially when their brand identity is challenged in court. The stakes are often high, with a business’s reputation, customer trust, and financial security hanging in the balance.  

One critical legal doctrine that can protect accused parties in trademark lawsuits is the "prior use defense." If you're facing a trademark dispute in California, you should become familiar with this concept and learn how it applies to your case. 

At the Law Offices of David H. Schwartz, INC., businesses across the San Francisco Bay Area, including San Jose, Santa Clara, San Mateo, Alameda County, and Oakland, can work with a trusted ally to resolve their legal conflicts.  

Attorney David Schwartz brings over 45 years of experience in business and commercial litigation, including trademark matters, trade secrets, shareholder disputes, and Civil RICO claims. With David’s deep familiarity with California law and a strategic approach to litigation, your business is in capable hands. 

What Is Prior Use Defense in Trademark Disputes? 

The prior use defense is a legal argument used by defendants facing trademark infringement lawsuits. It allows an entity to counteract a plaintiff’s claims by proving that the defendant had used the trademark in good faith for business purposes before the plaintiff registered or began using the same or similar trademark.  

Under this doctrine, the prior user can establish rights to continue operating under the existing mark, provided they meet specific conditions. The defense is particularly useful for small businesses or startups that have dedicated time and resources to building their brand long before a larger company comes along and stakes a claim to the same name or logo. 

Why Is Prior Use Defense Significant? 

Trademark disputes often arise when a company registers a mark and later discovers that another entity has been using an identical or confusingly similar one. Without a registered trademark, defendants may initially feel at a disadvantage. However, the prior use defense allows prior users to retain access to their brand due to the timing of trademark registration. 

Some of the key benefits of this defense include: 

  • Upholding equity: The principle acknowledges the good faith efforts of a business that has been using the trademark in question, potentially for years before a plaintiff sought trademark protection. 

  • Preserving business assets: It allows businesses to retain their long-established goodwill and customer recognition linked to their brand identity. 

  • Challenging aggressive litigation: Large companies often leverage their financial resources to assert trademark claims. However, the prior use defense can level the playing field for smaller businesses. 

California Laws Governing Prior Use Defense 

California follows state and federal trademark laws, meaning businesses in the region are subject to the Lanham Act (the federal trademark law) and the applicable California state statutes. Under the Lanham Act, the prior use defense is recognized for businesses meeting specific legal thresholds. 

To successfully claim a prior use defense in California, a business must demonstrate the following: 

  • Continuous prior use: The defendant must show they have been using the mark before the plaintiff’s registration date or claimed usage date. 

  • Geographic limitations: The defense may apply within the geographic area where the business has operated and gained public recognition. 

  • Good faith use: Evidence that the mark was used legitimately and not with the intent to mislead consumers. 

How Can Businesses Successfully Use a Prior Use Defense? 

Building a strong prior use defense requires substantial evidence and strategic planning. Here's what businesses can do to effectively use this argument in trademark litigation: 

  • Gather strong evidence: Documentation is critical when claiming prior use. Businesses should gather records such as sales receipts and invoices showing usage of the disputed mark, advertising materials displaying the mark, and digital records like website pages, social media posts, and email campaigns. 

  • Prove geographic reach: California businesses must show that their trademark use extends to an identifiable customer base in specific geographic areas. Testimonies from local customers or references to distribution networks can strengthen this claim. 

  • Demonstrate continuous usage: It’s not enough to show the mark was used previously; a defendant must also prove its continuous use leading up to the registration date of the plaintiff’s mark. 

  • Work with legal counsel: Trademark lawsuits can be complicated, so it’s important to have an experienced lawyer on your side. A lawyer familiar with California trademark law can review your case, collect the proper evidence, and create a strong defense strategy. 

Challenges Involved in Prior Use Defense 

While prior use defense is an instrumental tool, businesses might encounter hurdles when relying on it. Some of these challenge might include:

  • Documentation gaps: Without precise evidence of usage, proving your case becomes significantly harder. 

  • Geographic restrictions: Courts may limit the application of prior use defense to the areas where the defendant’s business is most active. 

  • Competing claims: If the plaintiff has a federally registered mark, the burden of proving prior use lies solely on the defendant. 

Business Litigation Attorney Serving the San Francisco Bay Area 

At the Law Offices of David H. Schwartz, INC., businesses in the San Francisco Bay Area, including San Jose, Santa Clara, San Mateo, Alameda County, and Oakland, rely on David to tackle tough litigation involving trademark disputes, trade secrets, complex business issues, shareholder actions, and more.

For David, litigation is a strategic game; you should know when to push aggressively and when to withdraw. Attorney David Schwartz has provided trusted advocacy for over four decades.