ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,445,094, issued on Oct. 14, was assigned to Roland Corp. (Shizuoka, Japan).
"Amplifier connected with a plurality of speakers" was invented by Toshiyuki Ochi (Shizuoka, Japan) and Mitsuo Shida (Shizuoka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An amplifier includes an amplification section for amplifying a musical tone signal input from an electric musical instrument. A plurality of speakers are connected to the amplifier. The amplifier includes a selection section selecting a speaker for outputting the musical tone signal amplified by the amplification section, among the plurality of speakers, a storage section storing a characteristic adj...