EspacenetEuropean Patent Office
Free patent search service from the European Patent Office covering patent documents worldwide.
Patent Search Tools
Ranking methodology
In development — no version effective yet.
Decision archetype: regulated · Scores are category-relative (P-01) and commercial relationships never affect rank (P-04).
Tools (3)
Google PatentsGoogle
Search engine for patent publications and prior art across multiple issuing authorities.
The LensLens.org
Patent search and analytics platform linking patents to scholarly literature and biological sequences.