IC card reader/writer, identification method and program

Details IC card reader/writer, identification method and program IC card reader/writer, identification method and program

2006-03-14

2006-03-14

Frech, Karl D. (Department: 2876)

Registers

Records

C340S572100, C340S572400

Reexamination Certificate

active

07011250

ABSTRACT:
This invention provides a reader/writer, ID method and program comprising a response-detection unit of detecting normal responses and collisions from IC cards in response to a request; and a response-invalidation unit of sending a response-invalidation command, which is a command not to respond to requests in the future, to IC cards that sent normal responses when the response-detection unit received normal responses from IC cards even though collisions were detected.

REFERENCES:
patent: 5929801 (1999-07-01), Aslanidis et al.
patent: 6040786 (2000-03-01), Fujioka
patent: 6547148 (2003-04-01), Kelly et al.
patent: 0 924 635 (1999-06-01), None
patent: 1 001 366 (2000-05-01), None
patent: 1 017 005 (2000-07-01), None
patent: 2000-298712 (2000-10-01), None
patent: WO 98/52142 (1998-11-01), None

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