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US6232537B1
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Piano action with articulated jack
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US5945613A
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Combination acoustic and electronic piano in which the acoustic action is disabled when played in the electronic mode
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AU6564298A
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Combination acoustic and electronic piano in which the acoustic action is disabled when played in the electronic mode
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US5866831A
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Simulated piano action apparatus for electronic keyboard
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US5844154A
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Combination acoustic and electronic piano in which the acoustic action is disabled when played in the electronic mode
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US5539142A
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Combined acoustic and electronic piano in which the acoustic action is disabled when played in the electronic mode
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US5567902A
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Method and apparatus for optically sensing the position and velocity of piano keys
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US4731729A
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Electronic digital dual sequential timing control apparatus for environmental systems
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US4674386A
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Augmented bass hammer striking distance for pianos
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US4602548A
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Tone compensator for piano soundboards
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CA1153912A
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Automatic control apparatus for chords and sequences
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US4444081A
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Arpeggio generating system and method
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US4379422A
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Polyphonic electronic music system
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US4655113A
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Rythm rate and tempo monitor for electronic musical instruments having automatic rhythm accompaniment
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US4383465A
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Space-wrapped strings for musical instruments
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US4449437A
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Automatic piano
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US4387623A
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Parallel motion linkage for the sliding keyboard cover of a piano
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US4400668A
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Period proportional two-phase voltage controlled oscillator
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US4389914A
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Chord identification system for electronic musical instruments
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US4361066A
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Tempo measurement, display, and control system for an electronic musical instrument
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