{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9758183","patent":{"patent_number":"US-9758183","title":"Location fingerprinting for transit systems","assignee":null,"inventors":[],"filing_date":"2014-09-30T00:00:00.000Z","publication_date":"2017-09-12T00:00:00.000Z","cpc_codes":["B61L","B61L","B61L","G01C","G01S","G01S","H04W","H04W","H04W","H04W"],"num_claims":27,"abstract":"Methods, program products, and systems for building a location fingerprint database for a transit system are described. The transit system can be a subway system including underground train stations and routes where location determination using GPS signals is difficult or impossible. A sampling device can measure signals, e.g., radio frequency (RF) signals detected at the stations or on the routes. A location server can construct a location fingerprint for each of the stations and the routes. Each location fingerprint can represent expected signal measurements by a user device if the user device is located at the respective station or route. The location server can provide the location fingerprint to a user device for the user device to determine a location of the user device within the station or on the route."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Location fingerprinting for transit systems","description":"Methods, program products, and systems for building a location fingerprint database for a transit system are described. The transit system can be a subway system including underground train stations a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9758183","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-9758183","citation_suggestion":"Patentable. \"Location fingerprinting for transit systems\" (US-9758183). https://patentable.app/patents/US-9758183","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9758183","json":"https://patentable.app/api/llm-context/US-9758183","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T03:56:51.422Z"}