Compact keyboard apparatus with accurate detection of key...

Complete transposable notation and keyboard music system for typ

Composition of resin for light transmitting keys of a musical ke

Computer keyboard adaptor

Device for patterned input and display of musical notes

Double touch key for musical instruments

Electric keyboard assembly and method of manufacturing...

Electro-mechanical keyboard memory for an electronic musical ins

Electronic keyboard musical instrument having key actuators

Electronic musical instrument

Electronic musical instrument having guitar-like chord selection

Electronic musical instrument keyboard

Electronic musical instrument keyboard apparatus

Electronic musical instrument keyboard apparatus

Electronic musical instrument simulating acoustic piano keytouch

Electronic musical keyboard apparatus resistant to yawing forces

Electronic piano

Electronic upright piano and a method of manufacture thereof

Engineers piano with bisymmetrical manuals and accompanying...

Ergonomic musical instrument keyboard