https://patents.google.com/patent/US20180013312A1/en
TK Moyer, CA Bossetti, JJ Terlizzi - US Patent App. 15/626,930, 2018
An inductive charging system can include a transmitter device and a receiver device. The transmitter device may be adapted to detect when a receiver coil in the receiver device is coupled to a transmitter coil in the transmitter device. For example, the …