How to Do a Free Trademark Search: TESS, TSDR, and Beyond

The Free Databases — What Exists and How They Work Together

The USPTO maintains two public trademark databases that are completely free to access, with no account or login required:

• TESS (Trademark Electronic Search System) — the primary search tool. Contains every trademark application and registration filed with the USPTO, including live marks, dead marks, abandoned applications, and pending applications. This is where you do active searching.
• TSDR (Trademark Status and Document Retrieval) — detailed record lookup by serial number or registration number. Shows the complete prosecution history of any filing: all documents submitted, all examiner actions, current status, maintenance deadlines. Use this when you need to investigate a specific mark you found in TESS.

Between these two tools, you have access to the complete U.S. federal trademark register. There is no paid subscription required. Everything the USPTO knows about every trademark ever filed in the United States is in TESS.

How to Search TESS: Step-by-Step

Access TESS at tmsearch.uspto.gov (the newer TESS successor). Here's how to run an effective search:

Step 1: Run a Basic Word Mark Search

Start with the simplest approach: search for your exact brand name in the "Word Mark" field with "Live" status selected. If you're searching for "Meridian" as a potential brand name, type "Meridian" and filter to live marks only. The system returns all active federal trademark registrations containing that exact text.

Review every result — not just exact matches. Pay attention to the Nice Classification class numbers. A "Meridian" mark in Class 9 (electronics) does not necessarily block you from registering "Meridian" in Class 43 (restaurant services). Whether it blocks you depends on how related the industries are.

Step 2: Search Phonetic Variations

The USPTO's likelihood-of-confusion analysis is based on how a mark sounds, not just how it's spelled. This is one of the most important things DIY searchers get wrong. You need to search phonetic equivalents:

• If your brand is "Neva," also search "Nova," "Niva," "Neve"
• If your brand is "Kwik," search "Quick," "Quik," "Kwick"
• If your brand uses unusual spelling, search the standard spelling

TESS has a "Phonetic" search option that uses an algorithm to find phonetically similar marks. It's imperfect but captures variants you might not think of manually.

Step 3: Search Plural and Singular Forms

A registered trademark for "Petal" can block an application for "Petals" in the same class. The USPTO treats plurals and possessives as potentially confusingly similar to the base form. Run both.

Step 4: Search Design Elements (if applicable)

If your mark includes a logo — an image, a shape, a distinctive design element — TESS has a Design Search Code system that categorizes visual elements. A stylized bird, a geometric triangle, a flame — each has a code. Search your design category to find existing marks with similar visual elements. This is significantly more complex than word searching and is where most DIY searchers either skip the step entirely or do it inadequately.

Step 5: Review the Goods and Services Description

For every conflict you find, read the goods and services description carefully. A mark in Class 35 "for online retail stores featuring athletic equipment" is more likely to conflict with your athletic apparel brand (Class 25) than a mark in Class 35 "for accounting services." The class number is a starting point — the actual description of goods and services determines the real scope of protection.

Reading TESS Results: What the Status Codes Mean

TESS marks appear with a status that tells you how to treat them:

• LIVE — REGISTERED: Active federal registration. Full trademark rights in force. This is the most important status to evaluate carefully.
• LIVE — PENDING: Application filed, not yet registered. Even a pending application can block your application if the examining attorney finds a likelihood of confusion. A pending mark establishes a priority date that you'd need to overcome.
• DEAD — CANCELLED: Registration was cancelled, typically for failure to file maintenance documents. The mark may be available, but verify: was it cancelled because the owner stopped using it, or because they missed a filing? If the owner is still actively using the brand in commerce, they may have common law rights even without registration.
• DEAD — ABANDONED: Application never made it to registration — the applicant abandoned it, usually by not responding to an Office Action. Less risky than cancelled registrations, but still check whether the underlying brand is in active use commercially.

What a Free Search Doesn't Cover

This is critical: TESS is comprehensive for federal registrations, but trademark rights exist beyond the federal register.

• State trademark registries: All 50 U.S. states maintain their own trademark registration systems. A state mark has narrower geographic scope than a federal mark, but it creates real rights and can complicate a federal application if the state registrant claims prior use. Most state databases are searchable for free on each state's Secretary of State website, but they're not aggregated anywhere.
• Common law trademark rights: Unregistered businesses that have been using a name in commerce have trademark rights in the areas where they operate — even with nothing registered anywhere. These rights don't appear in any database. Finding them requires Google searches, business directory searches, domain searches, and social media checks. This is the part of a search that no free tool can fully automate.
• Trade names and DBA registrations: A business operating under a DBA ("doing business as") doesn't necessarily hold trademark rights, but a long-operating business with that name has common law rights. State business registry searches help here.

A free TESS search gives you the federal register view — which is the most important single search. But it's not a complete clearance. Attorneys who charge for trademark clearance opinions aren't accessing different databases — they're applying legal judgment to everything they find: evaluating similarity, assessing the strength of conflicting marks, considering the relationship between industries, and advising on litigation risk. The judgment layer is what you pay for, not database access.

Using TSDR to Investigate a Specific Mark

Once TESS surfaces a mark you're concerned about, use TSDR to get the full picture. Go to tsdr.uspto.gov, enter the serial number from TESS, and pull up the complete record.

What TSDR tells you that TESS doesn't:

• The full prosecution history — every Office Action, every response, every argument made about the mark's registrability
• Whether a registered mark has filed its maintenance documents (if a mark's maintenance is overdue, it may be cancelled soon)
• The exact specimen submitted — which tells you how the owner is actually using the mark in commerce
• Assignment records — whether the mark has been sold or transferred to a different owner
• Section 15 incontestability status — a mark with incontestability is significantly harder to challenge

Practical Workflow for a Self-Directed Trademark Search

If you're doing this without an attorney, here's a practical sequence that covers the most ground:

1. Search TESS for the exact brand name (live marks, all classes)
2. Search TESS for phonetic variants and common spelling alternatives
3. Search TESS for your design elements if you have a logo
4. Search Google for the brand name + industry terms
5. Search social media platforms: Instagram, LinkedIn, Facebook, TikTok, YouTube
6. Search domain registrars for .com availability (strong common law signal)
7. Search your state's trademark registry via the Secretary of State website
8. Review what you found and assess: is any of this likely to generate a likelihood-of-confusion objection at the USPTO?

If step 8 produces anything concerning — a live registration in a related class with a phonetically similar name — stop and consult a trademark attorney before investing further in the brand.