A noncontact transmitting apparatus includes first and second noncontact transmitting units mounted on a main device and an attachment device, respectively. The second noncontact transmitting unit is removably attachable to the first noncontact transmitting unit for enabling noncontact signal transfer...http://www.google.es/patents/US6792246?utm_source=gb-gplus-sharePatente US6792246 - Noncontact transmitting apparatus
