Stopper rail for silent piano

Device and method for damping of aliquot tones

Upright keyboard instrument

Piano pedal actuating device and method of playing a piano using the device

Piano system and method thereof

Damper for piano

Automatic playing system

APPARATUS AND METHOD FOR MUTING STRINGS

Sound producing apparatus, keyboard instrument, and sound production control method

PIANO PEDAL DEPRESSING DEVICE

Damper action for upright piano with sostenuto spring tab using tension from the damper spring

Action of upright piano

Piano muffler system and method of installation

Repetition action mechanism for an upright piano

Electronic assistant system for lesson in music and musical instrument equipped with the same

Damper lever for upright piano

Elliptical silicone roller for grand piano action with customized durometer reading

Piano pedal operating device for people with disabilities