Wal-Mart has an idea for a floating warehouse that could make deliveries via drones
Wal-Mart has applied for a U.S. patent for a warehouse in the sky, which could make deliveries to shoppers' homes by way of drones. This could be the big-box retailer's latest move to take its e-commerce business to the next level. Bloomberg first reported the news Friday, while the patent was first submitted in February. The machine, similar to a...