Patent Search Engines 20

Free and commercial platforms for searching global patent literature

Free Platforms

Google Patents

Free
Full-text search across 120M+ patents and patent applications from 17+ patent offices worldwide.

Lens.org

Free
Open patent and scholarly literature search covering 140M+ patent records with analytics and export capabilities.

PQAI

Free tier
AI-powered semantic prior art search using natural language queries over a global patent corpus.

Espacenet

Free
EPO’s free patent database covering 120M+ documents from around the world, updated daily, with coverage from 1782 to today.

PATENTSCOPE

Free
WIPO’s international patent database covering PCT applications and national collections across 100+ countries.

Free Patents Online (FPO)

Free
Simple and fast US and international patent search with PDF download capabilities.

JPlatPat

Free
Official search platform for Japanese patents from the Japan Patent Office.

KIPRIS

Free
Korean Intellectual Property Rights Information Service for searching Korean patents.

PatentField

Free
Patent landscape visualization and search tool with semantic capabilities.

IP Screener

Free
Free patent screening and prior art search tool for inventors and researchers.

Commercial Platforms

Derwent Innovation

Paid
Clarivate’s enterprise patent intelligence platform with deep analytics, citation mapping, and global coverage.

Patsnap

Paid
Commercial IP intelligence platform connecting 116 jurisdictions with 140M patents and 250M+ innovation data points.

PatentInspiration

Paid
Visual patent analytics platform for technology scouting and competitive intelligence.

PatBase

Paid
Global patent database and analytics tool used by IP professionals for comprehensive prior art searches.

Orbit Intelligence

Paid
Questel’s patent analytics platform offering deep analytics and competitive intelligence workflows.

xlscout

Paid
AI-powered patent search platform using transformer-based models for high-accuracy prior art retrieval.

IPRally

Paid
Graph neural network based patent search platform built for speed and accuracy in prior art search.

Amplified AI

Paid
AI-assisted patent drafting and prosecution platform combining NLP with workflow automation.
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    Subject: Letter of Support for PQAI

    Dear PQAI Team,

    We are pleased to express our support for PQAI and its mission to revolutionize patent searching through open-source, AI-driven solutions.

    At [COMPANY NAME], we recognize the importance of accessible and efficient patent tools in fostering innovation and empowering inventors from diverse backgrounds. By supporting PQAI, we aim to contribute to the development of transparent, collaborative, and impactful solutions for the intellectual property community.

    We kindly request the addition of [COMPANY NAME] to the official List of Supporters of PQAI.

    Sincerely,

    [CEO or Equivalent Name]
    [Title]
    [Company Name]
    [Signature]