ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,738,400, issued on Sept. 15, was assigned to YAMAHA Corp. (Hamamatsu, Japan).

"Fader device" was invented by Taku Ueda (Toyohashi, Japan), Hisanobu Suzuki (Hamamatsu, Japan), Hisashi Nagai (Hamamatsu, Japan) and Kazuhiko Nishizawa (Hamamatsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fader device includes a plurality of shafts disposed parallel to each other, and a moving body attached to the plurality of shafts and movable in a longitudinal direction of the plurality of shafts. At least one of the plurality of shafts is a screw shaft with a male thread on an outer periphery thereof and is configured to be rotatable about an axis extending...