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.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.