Patent ID: 9633630
Date: 2017-04-25
CPC Classifications: G10C

Claim:
1. Keyboard for musical instruments, the keyboard comprising a first set of keys having an upper surface defining a keyboard plane, and a second set of keys comprising a base at the keyboard plane and a top above the keyboard plane, wherein the second set of keys comprises a first grouping consisting of C# and D#, and a second grouping consisting of F#, G#, and A#, the first set of keys and the second set of keys forming at least one octave, and wherein each of the keys of the first grouping has a first width of about 11.10±0.20 mm at the base and a second width of about 9.90±0.20 mm at the top; and each of the keys of the second grouping has a first width of about 10.40±0.20 mm at the base and a second width of about 9.90±0.20 mm at the top.