Birch, Stewart, Kolasch & Birch, LLP
Calculator device for enabling a keypad to function as both a keypad and a calculator
A calculator device mainly adds an additional calculator device capable of processing numeric data to the circuits of a keypad. When the keypad is linked to a computer, the keypad can be used to enter operation commands to the computer to perform processes desired, also can be switched to calculator function to perform numeric calculation when a switch button key (or switch) on the keypad is depressed.
Shin-Jiuh Corp.
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inventional inventional
Chin-Wen
Chou