{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8542220","patent":{"patent_number":"US-8542220","title":"Electromagnetic stylus with auto-switching","assignee":null,"inventors":[],"filing_date":"2010-12-07T00:00:00.000Z","publication_date":"2013-09-24T00:00:00.000Z","cpc_codes":["G06F"],"num_claims":12,"abstract":"An electromagnetic stylus includes a body, a core and an induction coil. The body includes a first shell and a second shell telescopically sleeved on the first shell. The core is received in and has a nib end extending out of the first shell. The induction coil is sleeved on one end of the core and is received in the first shell. The first shell is made of material without electromagnetic wave shielding capability. The second shell is made of material with electromagnetic wave shielding capability. The second shell is configured to slide along the first shell between two positions, to shield or not to shield part of the induction coil."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Electromagnetic stylus with auto-switching","description":"An electromagnetic stylus includes a body, a core and an induction coil. The body includes a first shell and a second shell telescopically sleeved on the first shell. The core is received in and has a","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8542220","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-8542220","citation_suggestion":"Patentable. \"Electromagnetic stylus with auto-switching\" (US-8542220). https://patentable.app/patents/US-8542220","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8542220","json":"https://patentable.app/api/llm-context/US-8542220","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T13:23:11.201Z"}