U.S. Patent 6,775,664*
U.S. Patent 6,308,175*
One-time rival of Yahoo! and Google, Lycos claims that TiVo, Netflix and Blockbuster infringe its two patents over the way they provide movie and television show recommendations to customers.
Dale's Comment: *I am not certain of the patents listed above. These were cited by Davis Freeberg as the most likely patents involved.. I'll update if/when I get more information. I wonder why Amazon.com wasn't named here. The methods used by these companies to recommend content is pretty straight forward and, to me, obvious.