Method and device for determining the polarity of a signal...

Animal husbandry – Animal controlling or handling – Electromagnetic remote control

Reexamination Certificate

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C340S573300

Reexamination Certificate

active

08047161

ABSTRACT:
Described is an animal containment system for containing an animal within a boundary, for maximizing the animal's usable area within the boundary, for not discouraging the animal from returning to within the boundary in the event the animal moves beyond the boundary, and for doing so without utilizing an independent polarity indicator. The animal containment system determines whether the animal is within the boundary or beyond the boundary by considering the polarity of an activation signal the animal containment system transmits from the boundary and receives at the location of the animal. The animal containment system determines the polarity of the activation signal by modulating the signal such that the modulation indicates the polarity of the activation signal. The animal containment system achieves the above-discussed features by delivering a stimulus to the animal only when it traverses the boundary from within the boundary.

REFERENCES:
patent: 5794569 (1998-08-01), Titus et al.
patent: 6415742 (2002-07-01), Lee et al.
patent: 6600422 (2003-07-01), Barry et al.
patent: 6657544 (2003-12-01), Barry et al.

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