ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,463,598, issued on Nov. 4, was assigned to Sumitomo Electric Industries Ltd. (Osaka, Japan).
"Outphasing amplifier" was invented by Takashi Sumiyoshi (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An outphasing amplifier includes a first amplifier configured to amplify a first signal, a second amplifier configured to amplify a second signal of which a phase difference from the first signal changes, and a synthesizer that has a first transmission line through which a third signal output from the first amplifier passes, a second transmission line through which a fourth signal output from the second amplifier passes, a first coupling circuit t...