{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8488428","patent":{"patent_number":"US-8488428","title":"Enhanced security of optical article","assignee":null,"inventors":[],"filing_date":"2008-05-14T00:00:00.000Z","publication_date":"2013-07-16T00:00:00.000Z","cpc_codes":["G11B","G06K","G11B","G11B","G11B","G11B"],"num_claims":36,"abstract":"An optical article comprising a first file encoded on the optical article comprising data structure information; a second file encoded on the optical article comprising a backup of the first file; wherein at least one of the first file or the second file must be fully readable for the player to read the data on the optical article; and a mark disposed on at least a portion of the optical article where the first file is encoded and at least a portion of the optical article where the second file is encoded; wherein the mark comprises an optical state change material; wherein the optical state change material undergoes a change in its optical state when exposed to an activation signal selected from one or more of a laser, thermal energy, infrared rays, X-rays, gamma rays, microwaves, visible light, ultraviolet light, ultrasound waves, radio frequency waves, electrical energy, chemical energy, magnetic energy, and mechanical energy; wherein the optical article is transformed from a pre-activated state to an activated state when an authorized activation method is used; and wherein the optical article is transformed from a pre-activated state to an incorrectly activated state when an unauthorized activation method is used."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Enhanced security of optical article","description":"An optical article comprising a first file encoded on the optical article comprising data structure information; a second file encoded on the optical article comprising a backup of the first file; whe","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8488428","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-8488428","citation_suggestion":"Patentable. \"Enhanced security of optical article\" (US-8488428). https://patentable.app/patents/US-8488428","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8488428","json":"https://patentable.app/api/llm-context/US-8488428","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T14:10:11.201Z"}