Is my business name trademarked?
Type the name into the search bar. Open Trademarks checks it against the United States, EU and Israeli registers it has read, shows when each was read, and gives one of three verdicts: an exact live mark exists, similar live marks exist, or no live match was found.
What "trademarked" means
A name is trademarked when an office has registered it, or when an application is pending, for particular goods or services. Both block a later filing for the same or similar goods. Registration is per register: a US registration says nothing about the EU, and the other way round.
Why the class matters
The same word can be a registered mark for clothing and free for software. Every mark is tied to Nice classes, 1 to 45. Tell the search what you will sell and it shows which matching marks overlap your classes and which do not.
What the search cannot see
Unregistered use (common-law rights in the United States), US state registers, the national registers of the EU member states, logos and shapes as images, and meaning in another language. In Israel, a mark written only in Hebrew is found only by a Hebrew spelling. A clean result is a positive signal, not clearance. For a filing decision, a trademark attorney reads more than a register.
The three registers
The USPTO daily XML file, the EUIPO register and the Israeli register on data.gov.il. The date each register was last read is on every result, and a register not read yet says so.