An implantable medical device, such as an implantable cochlear stimulator (ICS) system, utilizes laminated, sectionalized or particle-ized permanent magnets and/or keepers in both the implant portion and external (non-implanted) portion so as to reduce the electrical energy absorbed by both the implant...http://www.google.co.uk/patents/US6178353?utm_source=gb-gplus-sharePatent US6178353 - Laminated magnet keeper for implant device
