Pocket calculator with credit card controller and dispenser

Details Pocket calculator with credit card controller and dispenser Pocket calculator with credit card controller and dispenser

1985-08-12

1988-01-12

Trafton, David L.

Registers

Systems controlled by data bearing records

Credit or identification card systems

235379, 235441, 235486, 235492, G06K 500

Patent

active

047193387

ABSTRACT:
A portable transaction processing calculator has a keyboard and a display window along with slots for holding at least a pair of credit cards. One of the cards includes storage means therein and is electrically connected with the calculator, and another card has optical or other readable data thereon and readable by optical or other equipment. A selector switch on the calculator selects one of four different operations.

REFERENCES:
patent: 3548160 (1970-12-01), Welsh
patent: 4017835 (1977-04-01), Randolph
patent: 4053735 (1977-10-01), Foudos
patent: 4091270 (1978-05-01), Musch et al.
patent: 4208575 (1980-06-01), Haltof
patent: 4219151 (1980-08-01), Haruki
patent: 4277837 (1981-07-01), Stuckert
patent: 4491049 (1985-01-01), Mizuta et al.
patent: 4523297 (1985-06-01), Ugon et al.

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