I don't believe they have. That's the reason why we have charging bowls. Long range energy transmission hasn't been shown to be feasible using magnetics. I'm surprised they haven't started going into infrared lasers or microwaves with tracking technology instead.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.