Electronic keyboard musical instrument

Musical instruments – Keyboard type

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D17 5

Patent

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D03222691

REFERENCES:
patent: D282850 (1986-03-01), Futami
patent: D289411 (1987-04-01), Bellini
patent: D289412 (1987-04-01), Bellini
patent: D290370 (1987-06-01), Bellini
patent: D312651 (1990-12-01), Yamawaki
patent: D313033 (1990-12-01), Mizushima
patent: D313035 (1990-12-01), Katsuhara et al.
HFD, 8/24/87, p. 48 (Casio-SK-200).
Radio Shack Catalog, 1988, p. 52 (Realistic Keyboard at top, left).

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