KELLEY

mechanized units mounted on loading docks to secure trucks to the loading dock during loading and unloading

communication systems comprising a transmitter and receiver associated with a truck restraint mounted on a loading dock to establish communication between a truck drive and a dock worker on the dock

loading dock made primarily of non-metal, namely [ industrial traffic doors, ] dock enclosures to be mounted on a loading dock to engage and enclose an opening in a truck parked at the loading dock