Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2005-02-17
2008-03-18
Goins, Davetta W. (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S005200, C340S005530, C340S572500, C340S573100
Reexamination Certificate
active
07345584
ABSTRACT:
The present invention provides a portable device, comprising first identification means for wireless transmission and/or reception of electromagnetic radiation for the purpose of identification thereof, in addition to a system, comprising: a transmitter for wireless transmission of electromagnetic radiation with at least a first frequency, a portable device and a receiving circuit for wireless reception of electromagnetic radiation, wherein a change occurs in the electromagnetic radiation received by the receiving circuit when the device is located in the vicinity of the receiving device.
REFERENCES:
patent: 4070649 (1978-01-01), Wright et al.
patent: 5528002 (1996-06-01), Katabami
patent: 5892824 (1999-04-01), Beatson et al.
patent: 6714133 (2004-03-01), Hum et al.
patent: 6891474 (2005-05-01), Fletcher
patent: 6974917 (2005-12-01), Hattori et al.
Black Lowe & Graham PLLC
Goins Davetta W.
Wiebe van der Meer Holding B.V.
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