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Look up US trademark applications and registrations via the USPTO Trademark Status & Document Retrieval (TSDR) system. Supports lookup by serial number or registration number. Returns mark text, owner, goods/services, Nice classes, filing/registration dates, attorney of record, and mark images.

Look up a trademark

Endpoint
You can also look up by registration number:

Key parameters

Provide either serialNumber or registrationNumber. If both are provided, serialNumber takes precedence.

Response fields

See the API reference for the full response schema.