{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9759561","patent":{"patent_number":"US-9759561","title":"Heading constraints in a particle filter","assignee":null,"inventors":[],"filing_date":"2015-05-15T00:00:00.000Z","publication_date":"2017-09-12T00:00:00.000Z","cpc_codes":["G01C","G01S","G01S","G01S","G01S","G01S"],"num_claims":17,"abstract":"A method for computing a correction to a compass heading for a portable device worn or carried by a user is described. The method involves determining a heading for the device based on a compass reading, collecting data from one or more sensors, determining if the device is indoors or outdoors based on the collected data, and correcting the heading based on the determination of whether the device is indoors or outdoors."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Heading constraints in a particle filter","description":"A method for computing a correction to a compass heading for a portable device worn or carried by a user is described. The method involves determining a heading for the device based on a compass readi","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9759561","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-9759561","citation_suggestion":"Patentable. \"Heading constraints in a particle filter\" (US-9759561). https://patentable.app/patents/US-9759561","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9759561","json":"https://patentable.app/api/llm-context/US-9759561","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T09:19:25.359Z"}