ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,982, issued on Jan. 20, was assigned to Canon K.K. (Tokyo).

"Image forming apparatus using electrophotographic method and power supply apparatus thereof" was invented by Hiroki Asano (Kanagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image forming apparatus comprises a sensor provided in a toner container and is configured to detect information regarding a remaining amount of toner contained in the toner container. An AC power supply supplies an AC voltage to the sensor. A DC power supply generates a DC voltage in a given polarity by converting the AC voltage output from the AC power supply, and applies the DC voltage in the given po...