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Search US patent applications and granted patents via the USPTO Open Data Portal. Covers applications filed on or after January 1, 2001. Supports free-text queries, field-specific filters, date ranges, sorting, and pagination.

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Search patents

Endpoint
POST /legal/v1/patent-search

curl -X POST https://api.case.dev/legal/v1/patent-search \
  -H "Authorization: Bearer $CASEDEV_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "query": "neural network medical imaging",
    "assignee": "General Electric",
    "applicationType": "Utility",
    "filingDateFrom": "2018-01-01",
    "limit": 5,
    "sortBy": "filingDate",
    "sortOrder": "desc"
  }'

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Key parameters

ParameterTypeDescription
querystringFree-text query or field-specific search (supports AND/OR/NOT)
applicationTypestringUtility, Design, Plant, Provisional, Reissue
applicationStatusstringFilter by status (Patented Case, Pending, Abandoned)
assigneestringFilter by assignee/owner name
inventorstringFilter by inventor name
filingDateFromstringStart of filing date range (YYYY-MM-DD)
filingDateTostringEnd of filing date range (YYYY-MM-DD)
grantDateFromstringStart of grant date range (YYYY-MM-DD)
grantDateTostringEnd of grant date range (YYYY-MM-DD)
limitnumberResults to return (max 100)
offsetnumberPagination offset
See the API reference for the full parameter and response schema.