ALEXANDRIA, Va., July 3 -- United States Patent no. 12,348,053, issued on July 1, was assigned to AMAZON TECHNOLOGIES INC. (Seattle).
"Wireless power transfer system" was invented by Jian Li (San Jose, Calif.) and Marcel Colman Eric Stieber (San Jose, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Inductive power transfer across a rotary joint including a motor comprises a first portion with a magnetically permeable power transmit core with a power transmit coil and a second portion comprising a magnetically permeable power receive core with a power receive coil. The core material in the respective cores directs a time-varying electromagnetic field emitted by the power transmit coil toward the power r...