Patent ID: 8339291

Claim:
An alphabet input device in a small-sized keypad, comprising: a first keypad part comprising a plurality of buttons each of which is assigned with a symbol extracted from strokes of alphabet characters so that the alphabet characters be input by one of the buttons or a combination of two or more of the buttons; and a second keypad part comprising one or more buttons each assigned with an alphabet character having a high usage frequency, wherein the symbol comprises ‘-’, ‘|’, ‘.’, ‘(’, ‘)’, ‘U’, and ‘V’; the alphabet character having a high usage frequency comprises ‘A’, ‘E’, and ‘O’, ‘A’ is output in response to input of the ‘A’ button, ‘B’ is output in response to input in order of the ‘|’, ‘)’, and ‘)’ buttons, ‘C’ is output in response to input of the ‘(’ button, ‘D’ is output in response to input in the order of the ‘|’ and ‘)’ buttons, ‘E’ is output in response to input of the ‘E’ button, ‘F’ is output in response to input in the order of the ‘-’, ‘|’, and ‘.’ buttons, ‘G’ is output in response to input in the order of the ‘(’, and ‘.’ buttons, ‘H’ is output in response to input in the order of the ‘|’, ‘|’ and ‘ ’ buttons, ‘I’ is output in response to input in the order of the ‘|’, and ‘.’ buttons, ‘J’ is output in response to input in the order of the ‘U’ and ‘.’ buttons, ‘K’ is output in response to input in the order of the ‘|’ and ‘(’ buttons, ‘L’ is output in response to input in the order of the ‘|’ and ‘-’ buttons, ‘M’ is output in response to input in the order of the ‘|’, ‘|’ and ‘V’ buttons, ‘N’ is output in response to input in the order of the ‘|’ and ‘V’ buttons, ‘O’ is output in response to input of the ‘O’ button, ‘P’ is output in response to input in the order of the ‘|’, ‘|’ and ‘)’ buttons, ‘Q’ is output in response to input in the order of the ‘O’ and ‘.’ buttons, ‘R’ is output in response to input in the order of the ‘|’, ‘)’ and ‘.’ buttons, ‘S’ is output in response to input in the order of the ‘(’ and ‘)’ buttons, ‘T’ is output in response to input in the order of the ‘-’ and ‘|’ buttons, ‘U’ is output in response to input of the ‘U’ button, ‘V’ is output in response to input of the ‘V’ button, ‘W’ is output in response to input in the order of the ‘V’ and ‘V’ buttons, ‘X’ is output in response to input in the order of the ‘U’ and ‘U’ buttons, ‘Y’ is output in response to input in the order of the ‘V’ and ‘.’ buttons, and ‘Z’ is output in response to input in the order of the ‘-’, ‘.’ and ‘-’ buttons.