Electronic keyboard musical instrument

Musical instruments – Keyboard type

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D17 5

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D03252159

REFERENCES:
patent: D265832 (1982-08-01), Kira et al.
patent: D289411 (1987-04-01), Bellini
patent: D289412 (1987-04-01), Bellini
patent: D290370 (1987-06-01), Bellini
patent: D312265 (1990-11-01), Naito
patent: D313031 (1990-12-01), Yamawaki
patent: D318480 (1991-07-01), Naito
patent: D318482 (1991-07-01), Koide et al.
Best catalog, 1984-1985, p. 326 (Casio Keyboard, MT-35).
HFD, 12/16/85, p. 72 (Yamaha's PSS-150 Keyboard).
Music Trades, Jan. 1987, p. 101.

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