{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9812875","patent":{"patent_number":"US-9812875","title":"Systems and methods for adjusting magnetic field distribution using ferromagnetic material","assignee":null,"inventors":[],"filing_date":"2014-09-05T00:00:00.000Z","publication_date":"2017-11-07T00:00:00.000Z","cpc_codes":["H02J","H02J","H02J"],"num_claims":30,"abstract":"A uniform magnetic field may provide better performance in wireless power transmitters due to smaller impedance variations in an output of a power amplifier of a wireless power transmitter and also allow for wireless power transmitter pads to be thinner. One aspect of the disclosure provides a device for wireless power transfer. The device comprises a substantially planar transmit antenna that is configured to generate a magnetic field. The device also comprises a pad having a charging surface. At least a portion of the transmit antenna is disposed in the pad. The device also comprises a ferromagnetic material having a shape and a position relative to the transmit antenna. At least one of the shape or position of the ferromagnetic material, or a combination thereof, is selected to modify a distribution of the magnetic field at the charging surface."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Systems and methods for adjusting magnetic field distribution using ferromagnetic material","description":"A uniform magnetic field may provide better performance in wireless power transmitters due to smaller impedance variations in an output of a power amplifier of a wireless power transmitter and also al","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9812875","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-9812875","citation_suggestion":"Patentable. \"Systems and methods for adjusting magnetic field distribution using ferromagnetic material\" (US-9812875). https://patentable.app/patents/US-9812875","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9812875","json":"https://patentable.app/api/llm-context/US-9812875","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T07:18:18.431Z"}