{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8478768","patent":{"patent_number":"US-8478768","title":"Privacy-preserving collaborative filtering","assignee":null,"inventors":[],"filing_date":"2011-12-08T00:00:00.000Z","publication_date":"2013-07-02T00:00:00.000Z","cpc_codes":["G06Q","G06Q"],"num_claims":18,"abstract":"A recommender system can generate a predicted item rating for one user by performing collaborative filtering on item ratings from other users. The recommender system can include a client device that interfaces with a server to obtain a predicted item rating for a local user. The client device can generate a standardized ratings vector for the user, and computes a group identifier for the user based on the standardized ratings vector. The system also generates a noisy ratings vector for the local user, and sends a user-ratings snapshot to a recommendation server that includes the group identifier and the noisy ratings vector. The recommender system can also include the recommendation server that generates a predicted item rating for the user by performing collaborative filtering on ratings vectors from a plurality of other users that belong to the same ratings group."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Privacy-preserving collaborative filtering","description":"A recommender system can generate a predicted item rating for one user by performing collaborative filtering on item ratings from other users. The recommender system can include a client device that i","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8478768","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-8478768","citation_suggestion":"Patentable. \"Privacy-preserving collaborative filtering\" (US-8478768). https://patentable.app/patents/US-8478768","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8478768","json":"https://patentable.app/api/llm-context/US-8478768","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:05:40.869Z"}