Patent ID: 8425395

Claim:
An implantable device to be fixed to bone and comprising: an electrically conductive base body provided with at least two through holes and at least one pair of shaft-shaped contact means, wherein each of the contact means passes through a through holes of the base body and is adapted to penetrate a section of the bone in an implanted state, wherein the surface of each of the contact means comprises: a first electrically conductive surface section, a second electrically conductive surface section, and an electrically insulating surface section separating the electrically conductive surface sections from each other, wherein the first electrically conductive surface section of each of the contact means electrically contacts the base body in an implanted state while the second electrically conductive surface section of each of the contact means is electrically insulated with respect to the base body by means of the electrically insulating surface section in an implanted state, wherein an interior of each of the contact means contains a coil arrangement, each of the coil arrangements having: two electrical poles, a first electrical pole being electrically coupled with the first electrically conductive surface section, and a second electrical pole being electrically coupled with the second electrically conductive surface section of each of the contact means, and wherein the coil arrangements of the contact means of a pair are wound in opposite directions so that when an alternating magnetic field is permeating the coil arrangements for powering, the second electrically conductive surface sections of the pair have an electrical potential difference that is the sum of the electrical potential differences between the electrically conductive surface section of each of the pair of the contact means.