{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8508357","patent":{"patent_number":"US-8508357","title":"Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking","assignee":null,"inventors":[],"filing_date":"2009-11-25T00:00:00.000Z","publication_date":"2013-08-13T00:00:00.000Z","cpc_codes":["G06Q"],"num_claims":23,"abstract":"Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking are disclosed. A method for tracking a shopper includes receiving a first audio signal at a first location with a decoder attached to a shopping implement, determining a first code encoded in the first audio signal, receiving a second audio signal at a second location with the decoder, determining a second code encoded in the first audio signal, and transmitting the first code and the second code to a data retrieval device."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking","description":"Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking are disclosed. A method for tracking a shopper includes receiving a first audio signal at ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8508357","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-8508357","citation_suggestion":"Patentable. \"Methods and apparatus to encode and decode audio for shopper location and advertisement presentation tracking\" (US-8508357). https://patentable.app/patents/US-8508357","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8508357","json":"https://patentable.app/api/llm-context/US-8508357","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T07:00:17.549Z"}