Patent ID: 7937156

Claim:
An implantable device for mounting to a patient's bone comprising: a housing having an abutting face configured to prevent osseointegration of said housing with the patient's bone; one or more components mounted in said housing; and at least a first protuberance and a second protuberance configured to attach to the patient's bone without insertion of the first or second protuberance into the bone; wherein said first and second protuberances extend from said housing such that a longitudinal axis of the first protuberance and a longitudinal axis of the second protuberance are at opposing angles of about 45 degrees relative to an implant axis that is substantially orthogonal with the surface of the bone forming the pocket; and wherein the protuberance is configured to osseointegrate with the patient's bone and separate at least a portion of said outer surface of said housing from the patient's bone when said housing is positioned within a pocket formed in the patient's bone such that the first and second protuberances abut a surface of the bone forming the pocket prior to osseointegration.