{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9671389","patent":{"patent_number":"US-9671389","title":"Apparatus for measuring a level of a specific gas in exhaled breath","assignee":null,"inventors":[],"filing_date":"2010-10-29T00:00:00.000Z","publication_date":"2017-06-06T00:00:00.000Z","cpc_codes":["G01N","A61B","A61B","G01N","G01N","G01N","G01N","G01N","G01N","G01N"],"num_claims":12,"abstract":"There is provided an apparatus for measuring levels of a specified gas in exhaled breath, the apparatus comprising a photoacoustic sensor for providing a measurement representative of the level of the specified gas in the exhaled air, wherein the photoacoustic sensor comprises a light source that is modulated at a first frequency; a sound speed measurement module for measuring the sound speed of the exhaled breath, wherein the sound speed measurement module operates either at a second frequency that is substantially different to the first frequency or in a pulsed mode; wherein the first frequency of the modulated light source is adjusted during exhalation in accordance with the measured speed of sound of the exhaled breath."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Apparatus for measuring a level of a specific gas in exhaled breath","description":"There is provided an apparatus for measuring levels of a specified gas in exhaled breath, the apparatus comprising a photoacoustic sensor for providing a measurement representative of the level of the","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9671389","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-9671389","citation_suggestion":"Patentable. \"Apparatus for measuring a level of a specific gas in exhaled breath\" (US-9671389). https://patentable.app/patents/US-9671389","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9671389","json":"https://patentable.app/api/llm-context/US-9671389","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T11:41:49.287Z"}