The present invention relates to a device and a method for connecting a mobile phone handset to an external keyboard. A multimedia card slot interface is included in the portable keyboard of the present invention, which can be incorporated to the original interface of the handset. In the meantime, a...http://www.google.com/patents/US6628961?utm_source=gb-gplus-sharePatent US6628961 - Device and a method for connecting a mobile phone handset to an external keyboard
