US Patent 7502462 Keyboard for a mobile device

A keyboard apparatus includes a group of keys with corresponding actuation indicia for a plurality of numerals in a telephone keypad and a plurality of letters in an overlapping text-entry keyboard. Each key in the group is configured for multi-directional movement pivotally into multiple actuated positions that comprise at least one telephone numeral position and multiple text-entry letter positions that are each different from the telephone numeral position.