Find patents and applications by keywords, CPC class, filing date and owner

Answers: which granted patents / published applications are about X — by words in the title, abstract or claims (q, websearch syntax: words are ANDed, "quoted phrases" must be adjacent, -word excludes, or alternates; English stemming), and/or in a CPC level (cpc: C, C12, C12N, C12N15 or C12N15/88 — one level, not a free-form prefix), optionally only doc_type grant|publication, filed within filed_after..filed_before (inclusive, on the application's filing date), and/or in one entity's portfolio (entity_id from /v1/entities/search). At least one of q / cpc / entity_id is required (400 otherwise). This is keyword search over the weekly full-text products, not similarity or prior-art search. Each result: doc_number, doc_type, kind, application_number, title, date (grant/publication), filing_date, cpc, snippet (abstract with matches marked) and rank (ts_rank_cd; null without q). Ranked best first, then newest; page with next_cursor. total is the number of matches up to 10,000 (total_capped: true beyond). A query that runs longer than 10 s is a 504 computation_timeout: add a cpc level, doc_type, a date range or more specific words. Status of any hit: /v1/applications/{application_number}; its full claims: /v1/patents/{n}/claims. Costs 1 unit per 100 rows.