v44

latestOpenAPI 3.1.0Proprietaryraw.githubusercontent.com2026-05-192301780.0 KB

Legal

Look up USPTO trademark status

Look up trademark status and details from the USPTO Trademark Status & Document Retrieval (TSDR) system. Supports lookup by serial number or registration number. Returns mark text, status, owner, goods/services, Nice classification, filing/registration dates, and more.

post/legal/v1/trademark-search

Request body

serialNumberstring

USPTO serial number (e.g. "97123456"). Provide either serialNumber or registrationNumber.

registrationNumberstring

USPTO registration number (e.g. "6123456"). Provide either serialNumber or registrationNumber.

Response

Trademark lookup completed successfully

serialNumberstring

USPTO serial number

registrationNumberstring nullable

USPTO registration number (if registered)

markTextstring nullable

The text of the trademark

markTypestring nullable

Type of mark (e.g. "Standard Character Mark", "Design Mark")

statusstring nullable

Current status (e.g. "Registered", "Pending", "Abandoned", "Cancelled")

statusDatestring date nullable

Date of most recent status update

filingDatestring date nullable

Date the application was filed

registrationDatestring date nullable

Date the mark was registered

attorneystring nullable

Attorney of record

niceClassesinteger[]

Nice classification class numbers

imageUrlstring nullable

URL to the mark image on USPTO CDN

usptoUrlstring

Canonical TSDR link for this mark