The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2026
Filed:
Mar. 16, 2023
Apple Inc., Cupertino, CA (US);
Henry M. Daghighian, Cupertino, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A multilayer shield is used as an absorber for attenuating electromagnetic radiation (e.g., EMI) includes both metal and ferrite powder layers. Radiation transmitted through one of the metal layers be transmitted to an additional metal layer, and the radiation can be reflected between the metal layers. While reflected by the metal layers, the radiation is absorbed by one of the ferrite powder layers positioned between the metal layers, causing the ferrite powder layer to convert the radiation to thermal energy. Based on energy losses of the radiation due to reflection and thermal energy conversion, the radiation is sufficiently attenuated to limit disruption of nearby transmission signals, including high frequency transmission signals.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile