Abstract: A cargo blocker is disclosed for preventing displacement of palletized cargo in a moving vehicle. The cargo blocker includes a footplate adapted to be received under one edge of a loaded cargo pallet and a resilient brace attached to and extending generally upwardly from the footplate. The brace and the footplate form, in an unstressed condition, an acute angle of slightly less than 90.degree.. When the footplate is confined under a loaded cargo pallet, the vertical brace will be flexed with respect to the footplate. The resulting torque will exert a compressive force on the cargo contained on the pallet, to prevent dislodgement of the cargo.

Abstract: An electronic pricing display system for displaying pricing and other specialized information in real time on shelf display tags (18). Display tags (18) are battery operated and receive remotely transmitted infrared signals from optical heads (20) mounted on the ceiling of a store. A handheld electronic controller (22) may be carried by store personnel for obtaining information from or sending information to a selected wireless display tag (18). Pricing information from a main computer (10) is connected by an electronic interface (23) including a microprocessor (24) into a serial information stream having two separate frequencies for relay to the optical heads (20).