Minnesota Trademark Clearance: Search First

What is a trademark clearance search, and why run one before you commit to a name?

A trademark clearance search checks whether a name you want is already spoken for by someone whose rights could stop you from using it. The point is to find conflicts while changing course is still cheap, before you have paid for signage, packaging, a website, and the marketing that builds recognition. Under the federal Lanham Act, the United States Patent and Trademark Office (“USPTO”) will refuse to register a mark that “so resembles a mark registered in the Patent and Trademark Office, or a mark or trade name previously used in the United States by another and not abandoned, as to be likely . . . to cause confusion, or to cause mistake, or to deceive” (15 U.S.C. § 1052(d)).

The same likelihood-of-confusion standard drives infringement claims, so clearance is not asking “is this exact name taken?” It is asking the broader and more useful question: “is anything close enough to cause confusion already out there?” That is why two names that look nothing alike on paper can still collide, and why clearance takes judgment, not just a database lookup. Whether you can use a name that already exists usually turns on how different your goods, services, and customers are from the other business.

What does a knockout search catch, and what does it miss?

A knockout search is a fast, low-cost first pass that looks for identical or nearly identical names already on the federal register. It exists to kill a doomed name early: if an identical mark already covers your goods, you have your answer in a few minutes. You run one through the USPTO’s public search tool, Trademark Search, at tmsearch.uspto.gov. That system replaced the older Trademark Electronic Search System (“TESS”), which the USPTO retired on November 30, 2023, so any guidance still pointing you to TESS is out of date.

A knockout search is worth doing, but it misses a great deal. It will not reliably surface names that only sound alike or are spelled a little differently, design-only logos, businesses using a name without any registration, or marks registered only at the state level. It also will not catch names that mean the same thing in another language or that a customer would hear as identical, which are common blind spots when a brand spreads by word of mouth. Because the legal test is resemblance and not sameness, a name that sails through a knockout search can still be too close to something already in use. A knockout tells you whether to stop; it does not tell you that you are clear. It also helps to focus the search on the class of goods or services your mark will cover, since that is where a real conflict is most likely to sit.

Why isn’t a Google search or a Secretary of State name check the same as clearance?

A Google search and a business-name check each clear a much lower bar than trademark clearance. When you form a Minnesota limited liability company (“LLC”), the Secretary of State confirms only that your chosen name is “distinguishable upon the records in the Office of the Secretary of State” from other Minnesota entities (Minn. Stat. § 322C.0108, subd. 1(5)). That is a narrow test: it compares your name against a list of registered Minnesota companies, and nothing else.

It does not look at the federal register, at businesses in other states, or at anyone using a similar name without registering it. In my experience, the most common clearance mistake is a founder treating the Secretary of State’s approval as a green light for the brand. An available entity name is not a cleared trademark; the two systems answer different questions, and passing one tells you almost nothing about the other. Seeing how registered rights differ from common-law rights is where that distinction starts to make sense.

What does a full clearance search cover beyond the federal register?

A full clearance search adds the layers a register-only search misses. Federal law protects businesses that use a name in commerce even without a registration: it creates liability for a later use that “is likely to cause confusion, or to cause mistake, or to deceive as to . . . the origin, sponsorship, or approval” of goods or services (15 U.S.C. § 1125(a)). A name can be legally spoken for even though it appears in no register, which is why rights that arise from use alone belong in the search. The users who matter most are the ones selling similar goods to similar customers, because that overlap is where confusion actually happens.

Minnesota adds its own register. A mark under the state trademark act (Minn. Stat. § 333.18) can be refused when it “so resembles a mark registered in this state or a corporate, limited liability company . . . name in use or reserved in this state by another, or a mark or trade name previously used in this state” (Minn. Stat. § 333.19, subd. 1(6)). Notice that the state test reaches business names, not just registered marks. A complete search also checks domain names, social handles, app stores, and online marketplaces, the online places customers find brands, because that is where people actually encounter names today. App stores and online marketplaces deserve a careful look, since a competitor selling under your intended name there may hold unregistered rights you would never find on any register.

Why does the federal register matter even if I only do business in Minnesota?

Federal trademark rights are national, so the register matters even to a business that never sells outside Minnesota. Filing a federal application counts as “constructive use of the mark, conferring a right of priority, nationwide in effect,” as of the filing date (15 U.S.C. § 1057(c)). In plain terms, the first business to file can outrank a business that started using the same name later, even across state lines, through the constructive use doctrine.

Once a mark is registered, the registration is “constructive notice of the registrant’s claim of ownership” (15 U.S.C. § 1072). The constructive notice a registration gives means “I never knew about them” is not a defense: the law treats you as having known. A Minnesota company that stays entirely local can still lose a name to a business two time zones away that filed first. This is also why a search that stops at Minnesota records is incomplete: the risk that ends a brand often lives on the federal register, filed by someone you have never heard of. Doing business in one state does not put you outside a national register, so clearance has to include it.

How do the USPTO and courts decide whether two names are “confusingly similar”?

They ask whether the later name is likely to cause confusion, mistake, or deception, not whether the two names are spelled the same way. Minnesota’s deceptive-trade-practices statute states the test directly: it is a violation to cause “likelihood of confusion or of misunderstanding as to the source, sponsorship, approval, or certification” of goods or services (Minn. Stat. § 325D.44, subd. 1(2)). The federal registration bar and the federal infringement rule use the same yardstick.

Federal courts in the Eighth Circuit, which includes Minnesota, weigh a set of practical factors together rather than any single one: the strength of the earlier mark, how similar the two marks look and sound, how closely the goods or services compete, whether the newcomer meant to trade on the other’s name, any evidence of actual confusion, and how much care buyers use when choosing (SquirtCo v. Seven-Up Co., 628 F.2d 1086 (8th Cir. 1980)). Evaluating a search hit means running it through those factors, so two very different-looking names can conflict while two similar ones sometimes do not. Identical names in genuinely unrelated fields often coexist, while near-identical names competing for the same customer rarely do. Whether two businesses can share a name depends on where the marks and markets land, and the detail of how likelihood of confusion is judged fills in each factor.

What does a trademark clearance opinion cover, and how do you read one?

A clearance opinion is a written risk assessment from an attorney, and it sorts the risk into three parts. First, registrability: is the mark likely to be refused because it is too close to an existing one? Second, infringement risk: could a business already using a similar name bring a claim, even one that never registered? Third, strength: distinctive, coined names clear more cleanly and are easier to protect than descriptive ones. A good opinion does not tell you a name is “safe.” It tells you where on the risk spectrum the name sits and what would move it.

A clearance opinion also creates a record that you investigated in good faith before adopting the name. That record can matter later, because in exceptional cases a court may award more than actual damages or “reasonable attorney fees to the prevailing party” (15 U.S.C. § 1117(a)). Courts deciding whether to enhance an award weigh an infringer’s willfulness or bad faith as one factor among several, so documented diligence is evidence that you did not act in bad faith. It is worth getting the opinion before you file your own application, so the search scope matches the exact goods and services you plan to claim. Reading an opinion well means watching the caveats: which classes were searched, which markets were covered, and what the attorney could not rule out.

What does skipping clearance actually cost?

Skipping clearance risks two costs at once: a forced rebrand and a legal bill. The business cost comes first. A court can order you to stop using an infringing name, which means new signage, packaging, and domains, plus the lost goodwill in a name your customers already knew. In my practice, the trademark problems that are most expensive to fix are the ones where a business built a brand for a year or two, then received a cease-and-desist letter and had to start over. The rebrand is rarely just a new logo: it is new packaging runs, updated contracts and listings, and the slow work of teaching customers a new name.

The legal cost stacks on top. A prior owner who proves infringement can recover “(1) defendant’s profits, (2) any damages sustained by the plaintiff, and (3) the costs of the action,” and a court may enter judgment for up to “three times such amount” of actual damages (15 U.S.C. § 1117(a)). In Minnesota, adopting a confusing name is also a deceptive trade practice, because it “causes likelihood of confusion . . . as to the source” of goods or services (Minn. Stat. § 325D.44, subd. 1(2)). Set against a rebrand plus damages, a clearance search is inexpensive. Seeing what infringement looks like in practice makes the math obvious.

A name is one of the few early decisions that grows more expensive to change every month you use it. Clearance is not about finding a name nobody has ever used; it is about finding the conflicts that could block or unwind your brand while switching is still cheap. That means checking the federal register, common-law use, the Minnesota state records, and the places customers actually find you online, then weighing any hits against the confusion factors instead of a database’s yes or no. If you would like a second set of eyes on a name before you commit to it, email [email protected] with the name, your goods or services, and any close matches you have already found. For how I help Minnesota business owners protect what they build, see my trademark practice.