A key assembly for mounting an electronic component in the head of the key. The electronic component is mounted in either an opening such as a bore or recess formed in the key head, or a carrier connected to the heel end of the key shank. In the former case, a closure member such as a plug or adhesively...http://www.google.es/patents/US5433096?utm_source=gb-gplus-sharePatente US5433096 - Key assembly for vehicle ignition locks
