Fecha de publicación: 01/06/2005 Fuente: WIPO "bee" A supermarket trolley is fitted with a tracking device. The device may enable the motion of a trolley around a store to be followed by providing a plurality of sensors in the supermarket aisles. An alarm system may be fitted that is activated when the trolley enters a store and sounds an alarm if the trolley leaves the store without the alarm being deactivated. Alternatively, the tracking system may be activated when the trolley leaves the store. The tracking device may be activated by a light beam and may comprise a transmitter to allow the trolley to be located by means of the transmitted signal. The tracking device may be fitted into the handle of the trolley. The tracker system may be activated or deactivated remotely.