Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1988-09-29
1990-05-08
Pitts, Harold I.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235379, 235381, G06K 500
Patent
active
049240757
ABSTRACT:
A hand-held electronic apparatus such as an IC card including a data memory and a CPU has a keyboard and a display. The IC card includes a timepiece circuit which is kept operated. The IC card turns off the display in the standby state in order to save an internal battery. The CPU is also set in a HALT state since no clock signal is supplied thereto. When a start key for activating the IC card is pressed in the HALT state, the CPU is brought to an active state, and timepiece data from the timepiece circuit is automatically displayed on the display. When a numerical key is operated in the timepiece display state, a control mode is turned from the timepiece mode to a calculator mode, and a number corresponding to the pressed numerical key is input at a first digit position. If an account key (7-10) is pressed in the timepiece display state, a transaction mode of the corresponding account is set.
REFERENCES:
patent: 3813533 (1974-05-01), Cone et al.
patent: 4529780 (1985-07-01), Chaum
patent: 4614861 (1986-09-01), Pavlov et al.
patent: 4697072 (1987-09-01), Kawana
Kabushiki Kaisha Toshiba
Pitts Harold I.
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