About 4 Trademarks found that are owned by Kartdox Inc.

non-luminous, non-mechanical signs not of metal, namely, advertising placards made of multi-ply laminate that will be inserted into cart docks located in the parking lots of grocery stores, retail stores, airports and theme parks

Parking lot, surface mounted, non-metal retainer for preventing wheel movement of shopping carts

Non-metallic platform, joining two parking-lot-surface-mounted shopping cart docking stations, for displaying advertising

Non-metallic platform, joining two parking-lot-surface-mounted shopping cart docking stations, for displaying advertising