June 15, 1858

Henry Steinway, Jr. receives the United States patent #20,595 to “action for grand or square piano providing instantaneous return of the jack to its notch in the hammer-butt to enable improved quick repetition as compared to the invention described in 17,238”. The new Steinway & Sons action surpasses in quality Sébastien Érard’s highly praised “double-escapement” piano action.