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US 4,730,533 AGranted
Electronic keyboard instrument
OwnerJosef Schoerkmayrinventor
Life of this patent
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Abstract
A keyboard instrument having a plurality of keys which upon actuation each generate a tone correlated to the respective key, and having a plurality of optical display means on each of said keys, said display means indicating the sequence of the keys to be actuated.
Claims14
A keyboard instrument comprising:
- a plurality of keys each of which produces a tone upon being actuated which is correlated to the respective key;
- a plurality of optical display means on each of said keys;
- and
- means for simultaneously activating a plurality of said optical display means, each said simultaneously activated optical display means including means for indicating a sequence in which the respective keys are to be actuated.
1 more element
Dependencies are inferred from the claim text.