ALEXANDRIA, Va., July 16 -- United States Patent no. 12,671,382, issued on June 30, was assigned to HIOKI E.E. Corp. (Ueda, Japan).

"Differential amplifier circuit" was invented by Yuki Karasawa (Ueda, Japan), Koki Nakazawa (Ueda, Japan), Kenta Ikeda (Ueda, Japan) and Kimihiko Yamagishi (Ueda, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A differential amplifier circuit includes a basic differential amplifier circuit including an operational amplifier configured to amplify a potential difference between output ends of a first input resistor and a second input resistor, a feedback resistor connected to the output end of the first input resistor, and a first resistance element connected to the output e...