Search published US patent applications and grants by keyword and assignee via the USPTO Open Data Portal API

Steps

1. Create a USPTO.gov account and generate an ODP API key from the account settings (required starting June 2026)
2. Search patent applications by keyword in the title or abstract: POST https://api.uspto.gov/api/v1/patent/applications/search with JSON body containing q (query string using Lucene syntax), dateRangeBegin, dateRangeEnd, and fields to return
3. Filter by assignee name by adding assigneeEntityName:{company} to the query string; use AND/OR operators for multi-term queries
4. Retrieve the full application record: GET https://api.uspto.gov/api/v1/patent/applications/{applicationNumber} to get filing date, status, claims, abstract, and inventor details
5. Retrieve patent grant records (issued patents) using the separate grants search endpoint with similar query parameters
6. Download associated documents (published application PDF, office actions) via the file wrapper endpoint: GET https://api.uspto.gov/api/v1/patent/applications/{applicationNumber}/documents