On an adapter mounting portion 3a having a projecting cross section which is formed on a cap 3 of a small-sized memory card 1, a recessed portion of an adapter 2 side is fitted so that both parts are formed as an integral unit in a replaceable manner. Accordingly, the small-sized memory card 1 can maintain...http://www.google.es/patents/US7239011?utm_source=gb-gplus-sharePatente US7239011 - Memory card with a cap having indented portions
