What is a trademark?

A trademark is any word, phrase, logo, or symbol that identifies the source of a product or service — the thing that tells a customer "this came from that company" rather than a competitor. It doesn't have to be registered to exist: using a name in commerce creates some rights on its own. Registering it with the USPTO adds real advantages — nationwide priority, the right to sue in federal court, and the ® symbol — but it's the use, not the registration alone, that a trademark ultimately protects.

Trademark vs. business name

Registering an LLC or a "doing business as" name with your state protects your right to use that name for business filings in that state. It does nothing to stop someone else from using the same or a confusingly similar name as a trademark on their products, in your state or anywhere else. These are two entirely separate systems, and a lot of new business owners discover the difference the hard way.

Trademark vs. copyright vs. patent

A trademark protects a source identifier — a brand. It's easy to confuse with the other two:

• Copyright protects a specific creative work — the text of a book, the code of a program, the art in a logo — not the brand name itself.
• Patent protects an invention — how something works or is made — for a limited number of years, unrelated to branding entirely.

A single logo can actually touch all three: the design itself may be copyrighted, the brand name and logo together may function as a trademark, and if it embodies some genuinely novel mechanism, that mechanism could be patentable. Most businesses only ever need to think about the trademark piece.

Why this matters before you search

A clearance search — what this product does — only ever answers one question: does a proposed trademark conflict with something already on the U.S. federal register, or recently taken off it? It says nothing about whether a business name is available at your Secretary of State, and it isn't evaluating a copyright or a patent question at all. Knowing which box you're actually in is the first step to using a search like this correctly.