{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9843903","patent":{"patent_number":"US-9843903","title":"Method and apparatus for mobile device localization","assignee":null,"inventors":[],"filing_date":"2013-03-15T00:00:00.000Z","publication_date":"2017-12-12T00:00:00.000Z","cpc_codes":["H04W","H04W"],"num_claims":15,"abstract":"Because GPS does not work indoors, mobile electronics devices that use GPS for activities do not work inside a building. An embodiment of the present invention uses ultrasonic tone generators in each room. The ultrasonic tone generators can be built into cameras or separate devices. Each device may emit a unique tone that has a high enough frequency that most people cannot hear the frequency or combination of frequencies. Using a built-in microphone on a mobile device, the incoming audio may be analyzed in the frequency domain to determine the loudest tone above the human hearing threshold. This tone may be mapped to a specific room that can then be sent to the mobile electronics device to perform any location-aware actions."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for mobile device localization","description":"Because GPS does not work indoors, mobile electronics devices that use GPS for activities do not work inside a building. An embodiment of the present invention uses ultrasonic tone generators in each ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9843903","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-9843903","citation_suggestion":"Patentable. \"Method and apparatus for mobile device localization\" (US-9843903). https://patentable.app/patents/US-9843903","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9843903","json":"https://patentable.app/api/llm-context/US-9843903","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:21:28.820Z"}