A mobile telephone includes a body, a display, and a keypad. The keypad has a plurality of individual numeral keys assigned to individual numerals and may be rotated with respect to the body. In this way it is possible for the presentation of information on the display to remain in a fixed orientation...http://www.google.fr/patents/US6593914?utm_source=gb-gplus-shareBrevet US6593914 - Keypads for electrical devices
