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Yorimoto Yoshikazu C O Toppan, Takahashi Masashi C O Toppan P, Hirano Seiji C O Toppan Printe: Integrated-circuit card with a low power consumption mode.. Toppan Printing, January 10, 1990: EP0349726-A2 (29 worldwide citation)

A semiconductor integrated-circuit card including a microprocessor having an active mode of operation capable of processing data and a low power consumption mode of operation disabled from processing data, the microprocessor being operative to (1) establish the low power consumption mode of operatio ...


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Matsumura Hidekazu, Yorimoto Yoshikazu, Takahashi Masashi: High-security integrated-circuit card.. Toppan Printing, May 3, 1989: EP0314148-A2 (16 worldwide citation)

An IC card having one-chip microcomputer (2), a memory (3) and an address bus (4) and a data bus (5) for coupling the microcomputer (2) and memory (3), all built in a card-shaped body. A plurality of terminals (12) for coupling microcomputer (2) to a terminal device are provided on the surface of th ...


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Suzuki Tadato, Matsumura Hidekazu, Yorimoto Yoshikazu, Hiranto Seiji: Information card system communicable in contactless manner.. Toppan Printing, October 11, 1989: EP0336432-A1 (1 worldwide citation)

An information card system according to the present invention establishes a data communication between a terminal unit (52) and an information card (51) after receipt of an acknowledge signal (AK) supplied from the information card to the terminal unit, and the acknowledge signal is produced by a co ...