Latent Semantic Indexing (LSI) - used in Inforation Retrieval systems - is one example of a patented algorithm. https://en.wikipedia.org/wiki/Latent_semantic_a

Latent Semantic Indexing (LSI) - used in Inforation Retrieval systems - is one example of a patented algorithm. https://en.wikipedia.org/wiki/Latent_semantic_analysis https://en.wikipedia.org/wiki/Latent_semantic_analysis 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=4839853.PN.&OS=PN/4839853&RS=PN/4839853 http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=H...