search_patents

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Search USPTO patent applications and grants. Use `query` for free-text keywords ("lithium battery", "crispr", "machine learning"); all terms are required (AND), and you can quote a phrase to keep it together. Optional structured filters: `applicant` (exact corporate name as filed, e.g. "APPLE INC."), `inventor` (person name), `title` (words in the invention title), `number` (a specific application number), `filed_after` / `filed_before`, `granted_after` / `granted_before`. Common synonyms are understood — `assignee`, `company` and `owner` all reach `applicant`, and `keywords`, `q` or `text` all reach `query`. Results include title, application number, filing date, first applicant, all applicants, inventors, status, classification. `total` is the full match count but USPTO returns at most 25 records per search — narrow with applicant or a date range rather than raising `limit`. Powered by the USPTO Open Data Portal (data.uspto.gov).