How to Avoid Trademark Infringement: The Complete Guide for US Businesses

Step 1: Do a Comprehensive Trademark Search Before You Launch

This is the single most important thing you can do, and yet it’s the step most entrepreneurs skip because they’re excited and in a rush. Don’t be that person.

Before you fall in love with your brand name, search it thoroughly across multiple databases:

• USPTO’s TESS (Trademark Electronic Search System) at USPTO.gov — this is the official federal trademark database and your first stop
• State trademark databases — each state has its own registry
• Common law searches — Google, social media, domain registrars, and industry directories. Even unregistered trademarks can have enforceable rights if the owner has been using them in commerce

Pro tip: Don’t just search for exact matches. Search phonetic equivalents, plural forms, misspellings, and design variations. “Spotify” would still conflict with “Spohtify” — courts look at how things sound and how they feel, not just how they’re spelled.

In Interpace Corp. v. Lapp, Inc. (721 F.2d 460, 3d Cir. 1983), the court developed what’s known as the Lapp test — a multi-factor analysis used to determine likelihood of confusion. Factors include:

• the similarity of marks,
• the similarity of goods/services,
• the strength of the mark, evidence of actual confusion, and
• the sophistication of buyers.

This test is still widely used by courts today.

Step 2: Register Your Trademark with the USPTO — Don’t Sleep on This

Using a name without registering it is like building a house on sand. Sure, you have some common law rights from actual use in commerce, but they’re limited to your geographic area and much harder to enforce.

Registering with the USPTO gives you:

• A legal presumption that you own the mark nationwide
• The right to use the ® symbol
• The ability to block similar marks from being registered
• Access to federal courts and stronger legal remedies
• The right to record your mark with US Customs to block counterfeit imports

The registration process involves filing an application, a USPTO examiner reviewing it (which can take 8–14 months), a 30-day public opposition period, and then — if all goes well — registration. It’s not instant, but it’s worth every penny.

Important: Under the Trademark Modernization Act of 2020 (TMA), the USPTO has new tools to cancel fraudulent or abandoned trademarks cluttering the register — making it easier to clear the path for legitimate new marks.

Step 3: Understand the “Likelihood of Confusion” Test — This Is What Courts Look At

Courts don’t just flip a coin. When deciding if infringement happened, they run through a structured analysis. The most commonly cited federal standard comes from Polaroid Corp. v. Polarad Electronics Corp. (2d Cir. 1961), which laid out eight factors, often called the Polaroid factors:

1. Strength of the senior mark — How famous is the original brand?
2. Similarity of the marks — Do they look, sound, or mean similar things?
3. Proximity of the products/services — Are they competing in the same space?
4. Likelihood that the senior user will bridge the gap — Will they expand into the junior user’s market?
5. Evidence of actual confusion — Have customers already been confused?
6. Sophistication of the buyers — Are these informed, careful purchasers or everyday impulse buyers?
7. Quality of the junior user’s goods — Could the junior mark harm the senior brand’s rep?
8. Good faith of the junior user — Did they knowingly copy?

Bottom line: The more similar your mark is to an existing one, and the more your products overlap, the more likely a court will find infringement.

Step 4: Know the Difference Between Trademark Classes — Don’t Confuse Industries

Here’s something most people don’t know: trademark protection is class-specific. The USPTO uses the Nice Classification system, which divides goods and services into 45 different classes — everything from clothing (Class 25) to software (Class 42) to restaurant services (Class 43).

This means “Delta” can be both an airline brand and a faucet brand — because they’re in completely different classes with no overlap in consumer confusion risk. So when you’re doing your search, focus on your specific class(es) of goods or services, and be strategic about which classes you register in.

Practical example: If you’re launching a fitness app, you’d likely want to register in Class 41 (education and entertainment) and Class 42 (software as a service). Registering only in one class while using the mark in another could leave you exposed.

Step 5: Watch Out for Trademark Dilution — It’s Not Just About Confusion

Most people only think about confusion when they think about trademarks. But there’s another legal theory called trademark dilution under the Federal Trademark Dilution Act (15 U.S.C. § 1125(c)), and it applies to famous marks like Coca-Cola, Google, or Apple.

Dilution comes in two flavors:

• Blurring — using a similar mark in a way that weakens the distinctiveness of a famous mark (imagine “Apple” detergent)
• Tarnishment — associating a famous mark with something distasteful, low-quality, or offensive

The wild thing about dilution? The trademark owner doesn’t have to prove confusion — just that your use weakens their famous brand.

Landmark case: In Jack Daniel’s Properties, Inc. v. VIP Products (2023), the US Supreme Court ruled that VIP Products — which made a dog toy shaped like a Jack Daniel’s bottle as a “parody” — was NOT protected from trademark infringement and dilution claims.

Why? Because VIP was using the Jack Daniel’s marks as a source identifier for its own commercial product, not purely for expressive, non-commercial speech. The court made clear that the parody defense has real limits when money is on the line.

Step 6: Understand What “Fair Use” Actually Means in Trademark Law

Good news: not every use of someone else’s trademark is infringement. The Lanham Act (15 U.S.C. § 1115(b)(4)) includes a fair use defense that lets you use another’s mark under limited circumstances — without permission and without liability.

There are two types of trademark fair use:

• Classic Fair Use:

Using a trademarked word in its plain, descriptive sense — not as a brand identifier. For example, if “Sharp” is trademarked for electronics, a knife company can still describe their blades as having a “sharp edge.” You’re describing the product, not ripping off a brand.

• Nominative Fair Use:

Using someone else’s trademark to refer to their product — not your own. This covers things like comparative advertising, product reviews, news reporting, and criticism.

A car repair shop that says “We fix Toyota vehicles” is using “Toyota” in a nominative fair use context — they’re identifying whose cars they work on, not pretending to be Toyota.

What it does NOT cover: Using another’s mark to sell your own competing products, or in a way that suggests sponsorship or endorsement by the trademark owner.

Step 7: Don’t Trip Up on These Common Trademark Mistakes

These are the blunders that trip up even savvy business folks:

• Using a trademarked name in your domain or URL without permission.

Just because a domain name is available to buy doesn’t mean it’s legally safe to use. This could constitute cybersquatting under the Anti-Cybersquatting Consumer Protection Act (ACPA).

• Bidding on competitor trademarks in Google Ads.

Using a competitor’s trademarked name as a keyword to drive traffic to your site is a legal gray zone — and increasingly, courts and platforms are cracking down on it.

• Assuming foreign trademarks don’t apply in the US.

Under Abitron Austria GmbH v. Hetronic International (US Supreme Court, 2023), the Court confirmed that the Lanham Act does not apply extraterritorially — but foreign brands can still file for US protection. If a European brand is registered with the USPTO, it has full US rights regardless of where it originated.

• Copying “trade dress.”

Trademark protection extends beyond words and logos to the overall look and feel of a product or its packaging — known as trade dress. Think of the distinctive shape of a Coca-Cola bottle or the layout of an Apple Store. Copying these visual elements can be just as legally dangerous as copying a brand name.

Step 8: Monitor Your Own Mark — And Others’ — Continuously

Registering your trademark is not a “set it and forget it” move. You’ve got ongoing responsibilities:

• File a Section 8 Declaration (Affidavit of Use) between years 5 and 6 of registration, confirming you’re still using the mark
• Renew every 10 years (Section 9 Renewal)
• Actively monitor for new filings that conflict with your mark using USPTO alerts, trademark watch services, or tools like TESS

If you don’t enforce your trademark against infringers, you risk losing it to genericide — where a brand name becomes so commonly used that it loses protection. “Escalator,” “Thermos,” and “Aspirin” were all once trademarks before they became generic terms. Don’t let that happen to your brand.

Also Read: How to Protect Your Business Name and Logo in the United States: A Complete Guide for Small Business Owners