We are pleased to announce the grant of US patent 12,689,331 which describes the nature of the technology, suitable for any application of bipolar transistors, especially as an audio amplifier. The invention is a method to counter the inherent nonlinearity at the Base-Emitter junction of transistors, without the use of external feedback. This nonlinearity is the essence of the difference between transistor and vacuum tube sound. The technique can be applied in discreet circuits and integrated circuits (ICs).