WIPPEN OR REPETITION FLANGE BUSHING

REPETITION SPRING ASSEMBLY FOR AN UPRIGHT PIANO

Support assembly and keyboard apparatus

Support assembly and keyboard apparatus

Upright piano type action

Apparatus for assembling and regulating a grand piano action

Piano muffler system and method of installation

Upright piano and action unit incorporated therein

Keyboard musical instrument and action unit incorporated therein

Repetition action mechanism for an upright piano

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

Low inertia grand piano piano action

Universal grand piano piano action with simultaneous half stroke keyboard design capability

Grand piano composite piano action

Repetition lever of grand piano

Friction at the jack and knuckle interface in a grand piano eliminated

Method of improving repetitive striking performance, jack and action mechanism of piano

Back check for piano