{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-10521990","patent":{"patent_number":"US-10521990","title":"Digital key system","assignee":null,"inventors":[],"filing_date":"2019-02-28T00:00:00.000Z","publication_date":"2019-12-31T00:00:00.000Z","cpc_codes":["G07C","G07C","G07C","G07C","G07C","G07C","G07C"],"num_claims":7,"abstract":"In a digital key system, each of a digital key and a digital lock include two terminals and an electric circuit to superimpose and separate a high-frequency signal and a DC current. A microcomputer is operated by DC current supplied from a battery of the digital key through the electric circuit when the digital key is connected to the digital lock, thereby causing an NFC unit to perform communication by the high-frequency signal with the digital key through the electric circuit, read unlocking authority information from a non-contact memory, and authenticate the read unlocking authority information."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Digital key system","description":"In a digital key system, each of a digital key and a digital lock include two terminals and an electric circuit to superimpose and separate a high-frequency signal and a DC current. A microcomputer is","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-10521990","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-10521990","citation_suggestion":"Patentable. \"Digital key system\" (US-10521990). https://patentable.app/patents/US-10521990","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-10521990","json":"https://patentable.app/api/llm-context/US-10521990","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T15:31:58.472Z"}