nulity.ai
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Find the references
that win cases.

AI for patent invalidation, trained on every PTAB Final Written Decision. Built for IPR petitioners, defense counsel, and patent acquisition teams who can't afford to miss the reference that wins.

See how it works
01 · The corpusEvery issued US patent02 · The modelOutcome-aligned retrieval03 · Top resultsRanked prior art010.94020.87030.79040.71050.63

Every issued US patent flows through an outcome-aligned model. What you get back is the small set most likely to invalidate — ranked, explained, citation-grounded.