Electronic keyboard musical instrument

Musical instruments – Keyboard type

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D17 5

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D03255972

REFERENCES:
patent: D289411 (1987-04-01), Bellini
patent: D289412 (1987-04-01), Bellini
patent: D290370 (1987-06-01), Bellini
patent: D317774 (1991-06-01), Mizushima
patent: D317931 (1991-07-01), Koide et al.
patent: D318058 (1991-07-01), Koide
patent: D320032 (1991-09-01), Hoshina
patent: 4635521 (1987-01-01), Bellini
Hong Kong Toys, 1987, p. 90, (Keyboard, centre at the page).
Evans Catalog, 1987-1988, p. 311 (Casio Keyboard).
Music Trades, Apr. 1989, p. 24 (Yamaha DSR-2000 Electronic Keyboard).

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