Calculator device for enabling a keypad to function as both...

Details Calculator device for enabling a keypad to function as both... Calculator device for enabling a keypad to function as both...

2005-06-21

2005-06-21

Mai, Tan V. (Department: 2124)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Having specialized input

C345S169000

Reexamination Certificate

active

06910055

ABSTRACT:
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.

REFERENCES:
patent: 4891777 (1990-01-01), Lapeyre
patent: 5119078 (1992-06-01), Grant
patent: 5339097 (1994-08-01), Grant
patent: 2002/0188437 (2002-12-01), Chou
patent: 2003/0112159 (2003-06-01), Watanabe et al.
patent: 2004/0027334 (2004-02-01), Wu et al.

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