PatentsView
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US patent bibliographic and inventor data, formerly at api.patentsview.org, now moving to USPTO's data portal.
Alternatives in Academic
arXivSearches and retrieves metadata for millions of physics, math, CS and related research preprints.FreeCORESearch and metadata for 200M+ open-access research papers aggregated from repositories worldwide.FreemiumCrossref Metadata SearchSearch and fetch metadata for scholarly works by DOI, title, author, funder, or journal.FreemiumEPO Open Patent ServicesSearch European and worldwide patent bibliographic, full-text and legal-status data from the EPO.FreeEurope PMCSearch abstracts and full text of biomedical and life-science research literature.Free
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