Portable device with an active communication station...

Details Portable device with an active communication station... Portable device with an active communication station...

2007-01-17

2009-10-20

Le, Thien M. (Department: 2887)

Registers

Coded record sensors

Particular sensor structure

C235S449000

Reexamination Certificate

active

07604170

ABSTRACT:
A portable device includes an active device (communication station) configuration for contactless communication with at least one external data carrier and a passive device (data carrier) configuration for contactless communication with at least one external communication station. A detection circuit is provided to detect the presence of an external data carrier and/or the presence of an external communication station in a communication zone of the internal active device configuration and/or the internal passive device configuration. An activation circuit is coupled to the detection circuit to enable one of the two configurations based on the detection result.

REFERENCES:
patent: 4837556 (1989-06-01), Matsushita et al.
patent: 5841119 (1998-11-01), Rouyrre et al.
patent: 6462652 (2002-10-01), McCuen et al.
patent: 6659343 (2003-12-01), Tanaka
patent: 6832182 (2004-12-01), Wilson, Jr.
patent: 2005/0077356 (2005-04-01), Takayama et al.
patent: 2006/0208066 (2006-09-01), Finn et al.

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