Automatic warehouse apparatus is provided according to the present invention wherein a digital remote control system is relied upon to control the operations of a remote stacker adapted to pick-up and deposit loads at a support containing a plurality of discrete storage locations. According to one embodiment...http://www.google.es/patents/US3968888?utm_source=gb-gplus-sharePatente US3968888 - Warehouse sysem with parallel conductor positional control means for a stacker crane
Warehouse sysem with parallel conductor positional control means for a ...