{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8517280","patent":{"patent_number":"US-8517280","title":"IC card","assignee":null,"inventors":[],"filing_date":"2010-09-17T00:00:00.000Z","publication_date":"2013-08-27T00:00:00.000Z","cpc_codes":["G06K"],"num_claims":8,"abstract":"A contactless IC card which ensures the reliability of an IC chip mounted therein. Even if the distance between the contactless IC card and a reader/writer is too short, the card prevents an excessive voltage from being applied to the IC chip so that breakdown or reliability deterioration of the circuitry of the IC chip does not occur. The body of the contactless IC card has two interconnection substrates stacked between two external sheets. A first antenna coil formed on one interconnection substrate and a second antenna coil formed on the other interconnection substrate are opposite in winding direction. The number of turns of the second antenna coil is larger than that of the first antenna coil. Therefore, when the IC card comes close to the reader/writer, the voltage between two terminals of the IC chip is always smaller than the voltage induced in the second antenna coil."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"IC card","description":"A contactless IC card which ensures the reliability of an IC chip mounted therein. Even if the distance between the contactless IC card and a reader/writer is too short, the card prevents an excessive","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8517280","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-8517280","citation_suggestion":"Patentable. \"IC card\" (US-8517280). https://patentable.app/patents/US-8517280","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8517280","json":"https://patentable.app/api/llm-context/US-8517280","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T21:10:12.615Z"}