{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9820039","patent":{"patent_number":"US-9820039","title":"Default playback devices","assignee":null,"inventors":[],"filing_date":"2016-04-14T00:00:00.000Z","publication_date":"2017-11-14T00:00:00.000Z","cpc_codes":["H04R","G06F","G06F","G06F","G10L","G10L","H04L","H04L","H04R","H04R","H04R","H04S","H04S","H04W","H04W","G10L","G10L","H04L","H04R","H04R","H04R","H04W"],"num_claims":20,"abstract":"Systems and method discussed herein involve applying a designation of a default playback device in a media playback system. One method may involve maintaining a database comprising data indicating an assignment of an identification of a network microphone device to a playback zone of a media playback system, receiving a message indicating (i) the identification of the network microphone device and (ii) a media playback command, identifying the playback zone in the media playback system based on the data in the database and the received message, and transmitting to the playback zone, a message indicating the media playback command."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Default playback devices","description":"Systems and method discussed herein involve applying a designation of a default playback device in a media playback system. One method may involve maintaining a database comprising data indicating an ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9820039","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-9820039","citation_suggestion":"Patentable. \"Default playback devices\" (US-9820039). https://patentable.app/patents/US-9820039","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9820039","json":"https://patentable.app/api/llm-context/US-9820039","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:37:37.141Z"}