{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9619681","patent":{"patent_number":"US-9619681","title":"Device detecting spatial variation of complex permittivity and system detecting presence/absence of article","assignee":null,"inventors":[],"filing_date":"2013-10-08T00:00:00.000Z","publication_date":"2017-04-11T00:00:00.000Z","cpc_codes":["G06K","G06K","G06K","G06K"],"num_claims":14,"abstract":"Provided are a device detecting the spatial variation of the complex permittivity and an article presence/absence detection system which are capable of detecting the presence or absence of an article by using a UHF-band RFID tag. A device detecting the spatial variation of the complex permittivity includes an RFID tag, a conductor electrode unit, and a dielectric tag base material. The RFID tag performs communication using an electromagnetic wave in a UHF band. The conductor electrode unit communicates with the RFID tag by using the electromagnetic wave in the UHF band. The dielectric tag base material is provided between the RFID tag and the conductor electrode unit and separates the RFID tag from the electrode unit."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Device detecting spatial variation of complex permittivity and system detecting presence/absence of article","description":"Provided are a device detecting the spatial variation of the complex permittivity and an article presence/absence detection system which are capable of detecting the presence or absence of an article ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9619681","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-9619681","citation_suggestion":"Patentable. \"Device detecting spatial variation of complex permittivity and system detecting presence/absence of article\" (US-9619681). https://patentable.app/patents/US-9619681","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9619681","json":"https://patentable.app/api/llm-context/US-9619681","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T10:19:03.744Z"}