BLUF: A trademark lookup—also called a trademark search or clearance search—checks federal, state, and common-law sources for existing trademarks that could conflict with a proposed name, logo, or slogan. A comprehensive search should be performed before filing a trademark application or launching a brand because likelihood of confusion with an existing mark is the most common reason the USPTO refuses registration. Because comprehensive clearance searches can be complex, the USPTO recommends considering an experienced trademark attorney to conduct the search and interpret the results.
By Michael E. Kondoudis, Trademark Attorney with 25+ years of Experience
USPTO-Registered·1,000+ Trademarks Secured·Bar: U.S. Supreme Court
🔑 Key Takeaways: Trademark Lookups
A trademark lookup (also called a trademark search or clearance search) checks federal, state, and common-law sources to identify potentially conflicting trademarks and assess whether a proposed name, logo, or slogan is available for use and registration.
- Likelihood of confusion is the most common reason the USPTO refuses trademark registration. A clearance search identifies earlier marks that could create this conflict.
- The USPTO’s free federal search tool is Trademark Search at tmsearch.uspto.gov. The former Trademark Electronic Search System (TESS) was retired on November 30, 2023.
- A comprehensive trademark lookup has four basic steps: search federal trademarks → search state trademark databases → search common-law and internet sources → analyze the results for potential conflicts.
- A USPTO database search alone is not enough for comprehensive clearance. State registrations and unregistered common-law trademark rights may also create conflicts even when no conflicting federal registration appears.
Visual Overview: The Complete Trademark Lookup Process
The infographic below summarizes the entire trademark lookup process in one view — why a search is essential, the three categories of databases you must check (federal, state, and common-law), the exact four-step process, the difference between a basic DIY search and a professional clearance search, and key pro tips for reducing risk or rejection at the USPTO.
What is a Trademark Lookup?
A trademark lookup is a systematic clearance search across federal, state, and unregistered common-law sources to identify potentially conflicting trademark rights and assess the risk associated with using or registering a proposed name, logo, or slogan. It can help reduce the risk of application refusals, infringement claims, and forced rebrands.
A comprehensive trademark search investigates three types of sources:
- Federal Trademarks — Active registrations and pending applications at the United States Patent and Trademark Office (USPTO)
- State Trademarks — Registrations maintained in individual state databases
- Common-Law Trademarks — Unregistered brand identifiers used in commerce and visible on the internet, social media, or business directories
The primary objective is to identify potential conflicts before you invest in or launch a brand.
Why Should You Perform a Trademark Search Before Filing or Launching?
The USPTO refuses more trademark applications because of likelihood of confusion with an earlier mark than for any other reason. Likelihood of confusion is one of the core trademark requirements the USPTO evaluates before granting federal registration.
A rigorous and precise trademark lookup directly addresses this risk and delivers four clear business advantages:
- Reduces Application-Refusal Risk — Identifies potentially conflicting federal marks before you file
- Lowers Infringement Risk — Identifies earlier trademark uses that may create exposure to cease-and-desist demands or litigation
- Assesses Clearance Risk — Helps determine whether earlier federal, state, or common-law rights may limit use or registration
- Protects Marketing Investment — Helps reduce the risk of committing substantial resources to domains, packaging, signage, and advertising before potential conflicts are identified
When Should You Conduct a Trademark Search?
Execute a trademark lookup during the earliest stages of brand development — before you purchase domain names, finalize packaging, publish marketing materials, or begin sales. Searching early gives you an opportunity to identify potential conflicts before substantial resources are committed to the proposed brand.
Where Can You Perform a Trademark Search?
A complete trademark lookup has four steps: (1) USPTO federal search, (2) state searches, (3) common-law and internet search, and (4) analysis of the results. Steps 1–3 are the data sources; step 4 is the legal review.
The Three Data Sources
- The official USPTO Trademark Search system (federal)
- State trademark registries
- Common-law sources (search engines, social media, domain registries, marketplaces)
How Do You Perform a Trademark Lookup (Exact Four-Step Process)
Step 1: USPTO Federal Trademark Search
Access the official system at tmsearch.uspto.gov.
Enter your trademark into the search field to search the USPTO’s trademark database.
Beware: The USPTO may refuse registration when a proposed mark is confusingly similar to an earlier registered mark and the respective goods or services are related. So, search for exact matches and close variations of your trademark (e.g., different spellings, abbreviations, and plurals).
Critical update: The legacy Trademark Electronic Search System (TESS) was permanently retired on November 30, 2023. All federal searches now use the Trademark Search platform.
Effective search protocols include:
- Exact-match searches
- Phonetic equivalents and alternate spellings
- Plurals, hyphenations, and compound forms
- Design codes for logos
- Review of live, pending, and recently abandoned marks
- Related goods and services, including potentially related goods or services classified in different international classes
Step 2: State Trademark Lookups
Search the trademark databases of every state where you plan to operate or sell. Many secretaries of state provide free online tools linked from the USPTO website. For example, this is an example of the Maryland Secretary of State’s trademark search engine:
Step 3: Common-Law (Google) Trademark Search
Federal and state registries do not capture unregistered rights. Search multiple search engines, social media, domain registries, business directories, and e-commerce marketplaces, and other sources of marketplace use. Earlier unregistered common-law rights may create significant use and registration risks and may support opposition, cancellation, or infringement claims even when no conflicting federal registration appears.
Step 4: Review and Analyze the Results
Evaluate visual, phonetic, and conceptual similarity; relatedness of goods and services; strength of the earlier mark; and overlap in trade channels and geography. These factors help assess whether use or registration of the proposed mark presents a likelihood-of-confusion risk — the most common reason the USPTO refuses registration.
If an examining attorney determines that the proposed mark is likely to cause confusion with an earlier mark, the refusal is ordinarily issued in a USPTO trademark Office Action.
Before You File, Make Sure Your Trademark Search Goes Far Enough
Finding no exact match in the USPTO database does not necessarily mean your trademark is clear to use or register. A proper clearance search should consider similar marks, related goods and services, state registrations, and potentially conflicting common-law rights.
Michael E. Kondoudis is a USPTO-registered trademark attorney with more than 25 years of experience helping businesses evaluate, clear, and protect trademarks.
Schedule a Complimentary Trademark Strategy CallNationwide federal trademark representation · Flat-fee options available
Should You Do a Self-Search or Hire a Professional for Trademark Clearance?
| Comparison Aspect | Basic Self-Search | Professional Clearance Search |
|---|---|---|
| Financial Cost | Free | Paid (Flat-rate or hourly pricing) |
| Database Coverage | USPTO, basic state registries, and INternet/common-law sources | Multi-database federal, state, and common-law clearance research |
| Phonetic & Design Search | Minimal (Relies on basic exact-match text) | Full phonetic, alternate spellings, and design codes |
| Depth of Analysis | Limited (Based on user interpretation) | Full legal evaluation of likelihood of confusion |
| Risk of Missed Conflicts | Higher | Significantly lower |
| Best Used For | Early screening and low-stakes marks | Pre-filing decisions and high-value brands |
| When to Choose | Exploring initial concepts and naming ideas | Ready to legally file or launch a business |
A basic self-search can be useful for preliminary screening. A professional clearance search becomes more important when you are preparing to file, launch, or make a substantial investment in a brand.
Do You Need a Trademark Attorney?
Your domicile determines the legal requirement:
- Foreign-domiciled applicants, registrants, or TTAB parties must be represented by a U.S.-licensed attorney.
- U.S.-domiciled applicants are not required to hire an attorney, but the USPTO strongly encourages using specialized trademark counsel.
A specialized trademark attorney can conduct a professional multi-layered clearance search, provide clear advice on likelihood-of-confusion risk and appropriate classes, represent you through the application process, and help enforce your rights. The USPTO examining attorney assigned to your case cannot give you legal advice.
What Are the Official USPTO Search Tools for Trademark Lookups?
| Tool | Purpose | Access |
|---|---|---|
| Trademark Search | Primary federal search of live, pending, and dead marks | tmsearch.uspto.gov |
| TSDR | Status and document retrieval for serial or registration numbers | tsdr.uspto.gov |
| ID Manual | Acceptable identifications of goods and services | USPTO ID Manual |
| State Registry Links | Directory of individual state trademark databases | Linked from USPTO site |
TSDR retrieves status and documents by serial number or registration number. Those are different identifiers. For an explanation of the differences, see our guide to trademark serial number vs registration number.
Do You Need a Trademark Attorney for Your Trademark Search?
U.S.-domiciled applicants are not required to hire counsel. Foreign-domiciled applicants must have a U.S.-licensed attorney.
A trademark attorney can help identify legal and strategic issues before an applicant invests substantial time and money in a new application.
Trademark registration involves more than completing a government form.
Important decisions arise before the application is filed, including:
- whether the trademark is protectable;
- whether the trademark conflicts with earlier rights;
- who owns the trademark;
- which goods or services should be claimed;
- which classes are necessary;
- whether to file under Section 1(a) or Section 1(b);
- whether the specimen demonstrates qualifying use; and
- how broadly or narrowly the application should be structured.
Trademark Applications Filed With Counsel Have Historically Had Higher Registration Rates
An empirical study published in The Trademark Reporter analyzed decades of USPTO prosecution data and reported that approximately 60% of applications filed with counsel reached registration, compared with approximately 46% of pro se applications.
That is approximately a 31% relative increase in the registration rate.
Deborah R. Gerhardt & Jon P. McClanahan Lee, A Tale of Four Decades: Lessons from USPTO Trademark Prosecution Data, 112 Trademark Rep. 865 (2022).
The USPTO Encourages All Applicants To Work With a Trademark Attorney
The USPTO strongly encourages applicants to hire a U.S.-licensed attorney who specializes in trademark law to guide them through the federal trademark registration process.
A trademark attorney can help with:
- Trademark clearance: Conducting searches of USPTO records and relevant common-law uses to identify potentially conflicting marks.
- Goods and services: Identifying and describing the goods or services covered by the application in a way that accurately defines the intended scope of protection.
- Filing basis: Determining whether Section 1(a) use in commerce or Section 1(b) intent to use is appropriate.
- Specimens and evidence: Reviewing specimens and other evidence to help ensure they satisfy USPTO requirements.
- USPTO Office Actions: Analyzing refusals and responding to Office Actions when appropriate.
- Trademark strategy: Advising on registration, maintenance, enforcement, and expansion of trademark protection.
Experienced trademark counsel can help identify issues before filing, address USPTO refusals, and make informed decisions about the application’s scope and strategy. Professional legal advice can be especially valuable when a name has potential conflicts, descriptive or failure-to-function issues, or other registration risks.
Protect Your Brand the Easy Way
At The Law Office of Michael E. Kondoudis, we help founders, creators, entrepreneurs, and new and established businesses protect and grow their most valuable assets — their names and brands.
We serve clients nationwide and internationally from our headquarters near the USPTO in Washington, DC.
With more than 25 years of focused trademark experience and 1,000s of trademarks searched and filed, we take a practical, business-first approach.
We don’t overcomplicate the process. We clear the path so you can move forward with confidence. We also make getting started simple — whether you want guidance first or you’re ready to move forward now.
- Prefer to talk it through? Schedule a free strategy consultation. I’ll review your situation, answer your questions, and give you clear next steps — no pressure and no obligation.
- Ready to get started on your own timeline? Place an online order for a clearance search, trademark application, or related service. The process is straightforward and designed to keep things efficient.
Trademarks Made Easy® isn’t just our registered slogan—it’s how we work.
Honest Advice • Personalized Guidance • Fixed Fees
Frequently Asked Questions About Trademark Lookups and Searches
This reference section provides immediate, direct answers to the most common questions about Trademark Lookups and Trademark Searches.
Q: How do I check if a trademark is already taken for free?
You can perform a free basic trademark lookup by searching the USPTO Trademark Search system at tmsearch.uspto.gov, relevant state trademark databases, and common-law sources such as search engines, social media platofrms, marketplaces, business directories, and domain registries. Start with the federal database for live, pending, and dead marks, then expand to state registries and internet evidence of use. A free self-search covers the essentials but does not replace a professional clearance search for high-value brands.
Q: What is the most common reason the USPTO refuses a trademark application?
Likelihood of confusion with an earlier registered or pending mark is the number-one reason the USPTO refuses trademark applications. The examining attorney evaluates both the similarity of the marks and the relatedness of the goods or services under the DuPont factors.
Q: Can I still use the old TESS system?
No. The Trademark Electronic Search System (TESS) was permanently retired on November 30, 2023. All federal trademark searches must now be performed on the current Trademark Search platform at tmsearch.uspto.gov.
Q: Am I required to hire a lawyer for a trademark search?
U.S.-domiciled applicants are not legally required to hire an attorney for a trademark search or application. Foreign-domiciled applicants must be represented by a U.S.-licensed attorney. The USPTO strongly recommends specialized trademark counsel for everyone because self-searches frequently miss conflicts.
Q: Is a USPTO database search enough?
No. A complete trademark lookup has four steps: (1) USPTO federal search, (2) state searches, (3) common-law and internet search, and (4) analysis of the results. Steps 1–3 are the data sources; step 4 is the legal review.
Q: What is the difference between a trademark search and a trademark clearance search?
A basic trademark search identifies potentially conflicting marks, while a professional clearance search goes further by evaluating potentially conflicting rights and relevant likelihood-of-confusion factors, including similarities in appearance, sound, meaning, and commercial impression and the relatedness of the goods or services.
Q: Do I need to search all 50 state trademark databases?
A comprehensive clearance search should consider relevant state trademark and business registries in addition to the USPTO database and common-law sources. The appropriate geographic scope depends on the proposed use of the mark, existing rights, and anticipated expansion.
Q: Can I still use a name if it appears in a trademark search but is not federally registered?
Possibly, but the absence of a federal registration does not eliminate trademark risk. Earlier unregistered common-law rights may affect your ability to use the mark, may limit the practical value of a later federal registration, and may support opposition, cancellation, or infringement claims. Always evaluate the strength, geographic scope, priority, and relatedness of any earlier commercial use before proceeding.
Q: How do I search for trademarks that sound the same but are spelled differently?
Search for phonetic equivalents, alternate spellings, plurals, and sound-alikes using the USPTO Trademark Search system’s advanced capabilities and manual testing. Professional searches systematically cover these variations plus design-code searches for logos.
Q: Is Google enough for a common-law trademark search?
No. Google is a useful starting point but is not complete for common-law evidence. Also check multiple search engines, relevant marketplaces, social-media platforms, domain registries, business directories, and industry-specific sources for potentially relevant unregistered uses. The limits and risks of Google trademark searches are explained in our guide to Google Trademark Searches.
Q: How much does a professional trademark clearance search cost?
Professional trademark clearance searches are typically offered on a flat-fee or hourly basis. Cost varies with mark complexity (word mark versus design mark) and the depth of analysis required. Many attorneys include a written opinion on registrability risk.
Q: What happens if I skip a trademark search and file or launch anyway?
Skipping a trademark search significantly increases the risk of USPTO refusal, an opposition or cancellation proceeding, a cease-and-desist letter, or a forced rebrand. The cost of fixing a conflict after launch almost always exceeds the cost of a proper search performed in advance.
About the Author
Michael E. Kondoudis
U.S.-Licensed Trademark Attorney · USPTO-Registered Patent Attorney (Reg. No. 42,758) · Founder and Principal
Michael E. Kondoudis is the founder and principal of The Law Office of Michael E. Kondoudis®, a Washington, DC-based law firm focused on federal trademark matters. He helps businesses and entrepreneurs search, register, protect, and enforce trademarks before the United States Patent and Trademark Office. His practice includes trademark clearance, federal applications, USPTO prosecution, Office Action responses, registration, maintenance, and enforcement.
Learn more about Michael E. Kondoudis →Before You File a Federal Trademark Application
Before filing a federal trademark application, determine whether the mark is available, identify what should be protected, and select the correct filing strategy. These decisions can affect registrability, USPTO examination, and the scope of any resulting trademark rights.
Is Your Trademark Available?
A comprehensive clearance search can identify potentially conflicting federal, state, and common-law marks before you invest in filing or launching the brand.
What Should You Protect?
A name, phrase, logo, or other brand element may require a different filing format and protection strategy. In some cases, separate applications may be appropriate to protect different brand elements.
How Should You File Your App?
The owner, goods and services, trademark classes, filing basis, mark format, and specimen can affect USPTO examination and the scope of protection.
Ready to Protect Your Trademark?
Speak directly with Michael E. Kondoudis about trademark availability, what to protect, and the most practical federal filing strategy for your business.
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Disclaimer: No Attorney-Client Relationship or Legal Advice
This content is for general informational and educational purposes only and does not constitute legal advice. Reading or interacting with it does not create an attorney-client relationship. A formal relationship is formed only through a signed engagement agreement. Reading, sharing, or interacting with this content does not create an attorney-client relationship.
Do not send confidential trademark concepts or brand names through comments, forms, or email on this site — unsolicited information is not privileged. Trademark rights depend on specific facts and jurisdiction. Past results do not guarantee future outcomes. Consult a licensed trademark attorney for advice on your situation.
Remember: I am an experienced trademark attorney. However, I am not your attorney.