ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,562,595, issued on Feb. 24, was assigned to Daifuku Co. Ltd. (Osaka, Japan).

"Power supply device" was invented by Takeshi Hisano (Hinocho, Japan), Akira Murota (Hinocho, Japan), Masaaki Yamamoto (Hinocho, Japan) and Hiroshi Kamiyoshi (Hinocho, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A power supply device includes a power supply unit that outputs alternating current, an output unit connectable to a power supply line, and an adjusting unit that adjusts the capacitance of a power supply circuit between the power supply unit and the output unit. The adjusting unit includes a first capacitor, a second capacitor, and a circuit switching mechanis...