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Search USPTO Patent Public Search (PPS) for granted patents and pre-grant publications by title, abstract, inventor, assignee, full spec, or claim text — returning patent number, title, abstract excerpt, assignee, inventor list, filing/grant dates, and document URL.

Search Google Patents (~140M+ worldwide publications) by free-text query, assignee, inventor, country, status, language, or date range — returns publication number, title, priority/filing/grant/publication dates, inventor, assignee, snippet, PDF URL, and canonical landing-page URL for each match.