Data entry device with automatic sheet identification

Data entry keyboard

Data entry keyboard apparatus

Data entry keypad assembly

Data entry keypad assembly

Data entry method and apparatus

Data entry system

Data entry system

Data input apparatus

Data input apparatus having a microcomputer

Data input by means of a keyboard and a touch-sensitive graphica

Data input device and correlative encoding technique

Data input device and correlative encoding technique

Data input device and portable electronic device

Data input device for portable terminal

Data input device having switch matrix scanning means

Data input grid for computer

Data input terminal

Data inputting apparatus using rotary data drum

Data manipulation operation keypad for use with a pointing devic