ALEXANDRIA, Va., March 31 -- United States Patent no. 12,592,672, issued on March 31, was assigned to Yamaha Corp. (Hamamatsu, Japan).
"Power amplifier" was invented by Masao Noro (Hamamatsu, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power amplifier includes a first amplifier configured to amplify an input signal and output, from a first output, a first signal in which the input signal is amplified, a second amplifier configured to amplify the first signal and output, from a second output, a second signal in which the first signal is amplified, a third amplifier configured to amplify the second signal and output, from a third output, a third signal in which the second signal is amplified, a capa...