{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9771792","patent":{"patent_number":"US-9771792","title":"Method and apparatus for multi-channel downhole electromagnetic telemetry","assignee":null,"inventors":[],"filing_date":"2013-12-06T00:00:00.000Z","publication_date":"2017-09-26T00:00:00.000Z","cpc_codes":["H04B","H04L","H04L","H04L","H04L","H04L"],"num_claims":21,"abstract":"An electromagnetic (EM) telemetry method comprises encoding downhole data into a single data stream; separating the single data stream into a plurality of separate data streams; converting each separate data stream into a corresponding separate waveform using a selected digital modulation technique wherein at least one of the frequency and phase of each waveform is assigned a unique value or unique non-overlapping range of values; combining each separate waveform into a combined waveform; and transmitting from a downhole location, an electromagnetic (EM) telemetry carrier wave comprising the combined waveform."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Method and apparatus for multi-channel downhole electromagnetic telemetry","description":"An electromagnetic (EM) telemetry method comprises encoding downhole data into a single data stream; separating the single data stream into a plurality of separate data streams; converting each separa","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9771792","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-9771792","citation_suggestion":"Patentable. \"Method and apparatus for multi-channel downhole electromagnetic telemetry\" (US-9771792). https://patentable.app/patents/US-9771792","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9771792","json":"https://patentable.app/api/llm-context/US-9771792","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T13:38:04.257Z"}