The short version
- A clearance search looks for two different refusals: someone else's prior rights, and your own descriptiveness. Only the first one has anything to do with the database.
- Filing in a different class is not a defence. 37 CFR § 2.85(f) says classification schedules "shall not limit or extend the applicant's rights" — refusals turn on whether the goods are related, not on the class number.
- TESS was retired on 30 November 2023. Federal searching now runs through the USPTO Trademark Search system at tmsearch.uspto.gov, which uses field tags rather than the old Boolean field codes.
- Unregistered use creates rights the register cannot show you. An earlier user who adopted without knowledge keeps a defence, but "only for the area in which such continuous prior use is proved".
Type a name into the USPTO search box, see nothing identical, stop. That is a knock-out search: it can rule a name out and it can never rule one in. Everything expensive that follows — domain, logo, packaging run, filing fee — is bought on the assumption that it did.
A clearance search is looking for two refusals, not one
Section 2(d) of the Lanham Act refuses a mark that so resembles a registered mark "as to be likely... to cause confusion, or to cause mistake, or to deceive". That is the refusal everyone searches for. Section 2(e) refuses a mark that is merely descriptive of the goods, or primarily geographically descriptive, or primarily merely a surname. That one needs no third party at all. You cause it yourself, at the moment you choose the name, and no amount of searching the register will reveal it.
There is an escape route, and it is slower than it sounds. Under section 2(f) the office may accept proof that a descriptive mark has become distinctive, and may treat "substantially exclusive and continuous use... for the five years" before the claim as prima facie evidence. That is a five-year wait and an evidence file, entered into deliberately, for a name you could have replaced in a meeting.
Class numbers are a filing convenience, not a fence
The Nice Classification, administered by WIPO, sorts everything tradeable into 45 classes — 34 for goods and 11 for services — and is revised on two cycles: versions each January, full editions roughly every five years. It exists so that a register of millions of marks can be indexed and searched. It does not exist to allocate rights.
The regulation says so in one line. Under 37 CFR § 2.85(f), "classification schedules shall not limit or extend the applicant's rights". So the sentence people say to themselves — they are in class 25 and we are in class 9, so we are fine — is a filing observation, not a legal position. What decides a 2(d) refusal is whether consumers would expect both sets of goods to come from one source: sold together, advertised together, bought by the same people, found in the same aisle.
What the class number does and does not settle
Are the goods related?
Class number
Different class
Same class
Unrelated
No conflict
The comfortable case, and the only one where the class number and the answer happen to agree.
Coexists anyway
Class 25 holds socks and wedding dresses. A hit in your own class is a prompt to read the record, not a reason to rename.
Related
Refused anyway
The one people miss. Different classes, same shop, same buyer, same shelf — the goods are related and the class gap is irrelevant.
Refused, as expected
The hit a knock-out search is designed to find, and the only one it reliably finds.
The two questions also trade against each other. The more alike the marks are, the further apart the goods have to be before the pairing is safe — and the reverse. There is no threshold at which either one alone decides it.
TESS is gone, and the change is not cosmetic
The USPTO retired the Trademark Electronic Search System on 30 November 2023 and replaced it with a cloud-based system, Trademark Search, at tmsearch.uspto.gov. The old Boolean syntax and field codes are gone, replaced by field tags and regular-expression matching behind a plain search box. Much of the free search advice still online tells you to type queries the system no longer accepts — worth knowing before you read a syntax error as a clear field.
What you search matters more than where. Marks collide in sound, in appearance and in commercial impression, not in spelling. The USPTO's own illustration of a confusable pair is "T. Markey" and "Tee Marquee": no shared letters to speak of, one mark. Searching the literal string you intend to register is therefore the least informative search you can run.
The register is the easy half
The USPTO's own guidance on comprehensive clearance sends you well past its database: the Official Gazette, state trademark and business registries across all fifty states plus DC and Puerto Rico, Madrid Monitor, the WIPO Global Brand Database, EUIPO and TMview, domain registries, and plain internet searching. Its floor is explicit — "at a minimum, be sure to check our database and the TMOG for federal applications and registrations, and also search the internet for common-law use".
That last item is not a formality. Trademark rights come from trading under a name, not from filing, and nobody indexes them for you. The mechanism that decides who wins is worth stating precisely, because it answers the question people actually ask.
Filing creates constructive use as of the filing date — nationwide priority against everyone except those already using the mark, or already on file, before then. An earlier user who adopted without knowledge of yours keeps a defence, but section 1115(b)(5) limits it to "the area in which such continuous prior use is proved". So yes: two unrelated businesses can trade under one name in different states indefinitely, and thousands do. The arrangement is stable only until one of them files. From that date the other is frozen into the patch it can prove, and the rest of the country belongs to the filer.
The strongest name is the one a search can clear
Naming instinct pulls towards names that explain the product. Clearance pulls the other way, and they are the same force seen from opposite ends. A name built from the ordinary words of your trade is a name every competitor also reached for: the search returns a crowded field, every result is arguably related, and the mark is refusable as descriptive even if you clear all of them.
Distinctiveness, read as a clearance cost
Coined
Arbitrary
Suggestive
Descriptive
A suggestive name — one that hints at a quality without stating it — is the commercial compromise, and also where searching starts producing usable answers. The descriptive-suggestive boundary is genuinely fuzzy and examining attorneys disagree about it, so treat a name on the line as a name that will need an argument. Trademark, copyright or patent covers which regime is doing the work in the first place.
How to run the search
- 1
Write down what you actually sell
Describe the goods and services in the plainest words you would use to a customer. The USPTO Trademark ID Manual holds pre-approved wordings; picking one now fixes the boundary every later comparison is made against.
- 2
Screen the literal string
Search the exact name in the Trademark Search system. The cheapest step and the least informative: a clean result here means only that the obvious conflict is absent.
- 3
Search the way an examiner would
Repeat for phonetic equivalents, plausible misspellings, the root word without your prefix or suffix, and the name split into its parts. If your mark has a logo, search the Design Search Code Manual for the visual elements too.
- 4
Read the hits rather than counting them
For every near match, open the record: live or dead, what goods it actually covers, who owns it. A dead registration whose owner is still trading is a common-law problem, not an empty field.
- 5
Leave the register
Search state registries, the Official Gazette, domain registries, app stores, social handles and the open web for the name alongside your goods. The conflicts the database cannot show you live here.
- 6
Search the name against the dictionary
Ask whether it merely describes the goods, is primarily geographically descriptive, or is primarily merely a surname. Each is a separate refusal under section 2(e), and none of them requires anybody else to exist.
- 7
Decide before you spend
Write down what you found and what you are choosing to accept, then commit. The search exists to move the decision to the point where changing your mind is still free, not to produce certainty.
Trademark licence agreement
Once the name is cleared, anyone else who uses it — a franchisee, a reseller, a collaborator — needs a licence with quality control in it. Full text, free to read and copy.
You found something similar. Now what?
A hit is not a verdict. What it is, is a price, and the price rises steeply with how late you find it.
What a conflict costs to resolve, cheapest first
- A meeting
Change the name
Free before the logo, the domain and the packaging exist. It stops being free the day a customer first types the name.
- Low
Narrow what you claim
A tighter identification of goods can move you out of the other owner's lane. It also shrinks what you can enforce against anyone else later.
- Moderate
Ask for consent
A consent or coexistence agreement dividing goods or territory. Examining attorneys weigh these, but it needs the other owner to want something from you.
- Highest
Buy or licence the mark
Sometimes the mark is dormant and the owner will sell. Sometimes the approach is the moment a competitor learns your launch plans.
Conflicts found before the spend are almost always settled on the first rung. Conflicts found after it are settled on the third or fourth.
If the conflict runs the other way — you were first, and somebody else has appeared under your name — the sequence is different and starts with evidence of your own first use. Someone copied my work covers what actually moves, and a cease and desist is usually the opening move rather than the whole plan.
One thing to fix before any of that: own the logo. A designer who drew your mark holds the copyright in the drawing unless it was transferred, so an application for a mark you do not own is money spent improving someone else's asset. A short IP assignment at the point of payment costs nothing, and is unavailable three years later when the designer has moved on.
What the search is really buying
Not permission. Nobody issues that, and the examining attorney runs their own search regardless of what yours found. A search run by hand is good at one job — killing bad candidates early and cheaply — and poor at the other, which is telling you the survivor is safe; that asymmetry is why the USPTO points at screening services and attorneys for anything you intend to build on. What it does buy is the chance to make the naming decision while it is still reversible, a window that closes the first time the name appears on something you paid to print. The most useful outcome is usually a rejected shortlist.
Sources
- USPTO — Comprehensive clearance search for similar trademarks
- USPTO — Retiring TESS: the new trademark search system
- USPTO — Likelihood of confusion
- 37 CFR § 2.85 (classification schedules) — Cornell LII
- 15 U.S.C. § 1052 — grounds for refusal — Cornell LII
- 15 U.S.C. § 1115 — incontestability and defences — Cornell LII
- WIPO — Nice Classification FAQ
General information, not legal advice. This guide explains how these documents and rules generally work. Law varies by jurisdiction and changes, and none of it is applied to your circumstances here. For anything consequential, consult a licensed attorney where you are.
Frequently asked
How do I do a trademark clearance search?
Describe your goods and services in plain words first. Search the exact name in the USPTO Trademark Search system, then repeat for phonetic equivalents, misspellings and the root word. Open every near match to check whether it is live, what goods it covers and who owns it. Then search state registries, domains and the open web for unregistered use, and finally test the name for descriptiveness.
Which trademark class should I file in?
The class that matches what you actually sell, described in the terms the Trademark ID Manual uses. Choosing a class is an indexing decision, not a strategic one: the regulation says classification schedules do not limit or extend an applicant's rights. Filing in an unusual class to avoid a conflict does not work, because a refusal turns on whether consumers would think the goods came from one source.
Can two businesses have the same name in different states?
Yes, and many do. In the United States rights arise from use, and an unregistered user's rights reach only the area where the mark is genuinely used and known. That balance holds until one of them files a federal application, which creates nationwide priority from the filing date. After that, the earlier user keeps only the area in which continuous prior use can be proved.
What is the difference between a descriptive and a suggestive trademark?
A descriptive mark tells you what the goods are or do; a suggestive mark requires a small mental step to get there. The line matters because descriptive marks are refused under section 2(e)(1) unless they have acquired distinctiveness, which normally means five years of substantially exclusive use plus evidence. Suggestive marks are registrable straight away, and clear far more easily.
Is the free USPTO search enough on its own?
It is enough to eliminate bad candidates and not enough to approve a good one. The federal database holds registrations and pending applications only. It does not hold state registrations, unregistered common-law use, business names, domains or social handles, and those are where the conflicts a beginner misses usually sit. The USPTO itself suggests a screening service or an attorney for anything you intend to build on.