The Mercury News is reporting that on January 3rd, Lycos filed a patent lawsuit against TiVo, Netflix and Blockbuster over their use of recommendation technology. The article doesn’t give the exact patents that are alleged to be violated, but a quick scan of Lycos’ patent filings shows patents 6775664 and 6308175 as the most likely candidates.
Patent 6775664 was originally filed on Oct. 22, 2001 and describes a search method that uses a user feedback system to provide “collaborative feedback data for integration with content profile data in the operation of the collaborative/content-based filter.”
Patent 6308175 was filed on Nov. 19th, 1998 and according to the patent, it covers technology whose “filter system compares received informons to the individual user’s query profile data, combined with collaborative data, and ranks, in order of value, informons found to be relevant. The system maintains the ranked informons in a stored list from which the individual user can select any listed informon for consideration.”