Sight-transposing enabling keyboard for musical instruments

Details Sight-transposing enabling keyboard for musical instruments Sight-transposing enabling keyboard for musical instruments

1982-07-14

1985-12-17

Corrigan, Jane E.

Musical instruments

Keyboard type

Element or attachment

Patent

active

D02817845

REFERENCES:
patent: D214465 (1969-06-01), Maley
patent: 2097280 (1937-10-01), House
patent: 2807183 (1957-09-01), Ney

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