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http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%
2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=10,496,691.PN.&OS=PN/10,496,
691&RS=PN/10,496,691
Implementations provide an improved system for presenting search
results based on entity associations of the search items. An
example method includes generating first-level clusters of items
responsive to a query, each cluster representing an entity in a
knowledge base and including items mapped to the entity, merging
the first-level clusters based on entity ontology relationships,
applying hierarchical clustering to the merged clusters, producing
final clusters, and initiating display of the items according to the final
clusters.