{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9829577","patent":{"patent_number":"US-9829577","title":"Active indoor location sensing for mobile devices","assignee":null,"inventors":[],"filing_date":"2015-08-03T00:00:00.000Z","publication_date":"2017-11-28T00:00:00.000Z","cpc_codes":["G01S","G01S","H04W","H04W"],"num_claims":20,"abstract":"An active indoor location sensing technique is presented for smartphones and other types of mobile devices without requiring any additional sensors or pre-installed infrastructure. The main idea is to actively generate acoustic signatures by transmitting a sound signal with a phone's speakers and sensing its reflections with the phone's microphones. This active sensing achieves finer-grained control of the collected signatures than the widely-used passive sensing."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Active indoor location sensing for mobile devices","description":"An active indoor location sensing technique is presented for smartphones and other types of mobile devices without requiring any additional sensors or pre-installed infrastructure. The main idea is to","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9829577","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-9829577","citation_suggestion":"Patentable. \"Active indoor location sensing for mobile devices\" (US-9829577). https://patentable.app/patents/US-9829577","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9829577","json":"https://patentable.app/api/llm-context/US-9829577","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:30:29.368Z"}