An electronic containment system using positional satellites is provided for controlling the movement of animals relative to a selected confinement area. A portable programming transceiver is used to program the boundary of a selected confinement area as the device is moved along such boundary. A programmable...http://www.google.fr/patents/US6271757?utm_source=gb-gplus-shareBrevet US6271757 - Satellite animal containment system with programmable Boundaries
Satellite animal containment system with programmable Boundaries
