ALEXANDRIA, Va., June 17 -- United States Patent no. 12,315,674, issued on May 27.
"Ferrofluid control device" was invented by Chunjie Zhang (Guangzhou, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a ferrofluid control device, which generates two different magnetic fields by placing the first magnetic conductor and the second magnetic conductor at different positions of the first coil group, thereby enabling the ferrofluid to produce more abundant dancing effects. Furthermore, a richer dancing effect can be realized by adding the second coil group and the third magnetic conductor."
The patent was filed on April 8, 2023, under Application No. 18/297,611.
*For furth...