Electronic keyboard musical instrument

Musical instruments – Keyboard type

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D03572706

REFERENCES:
patent: D317319 (1991-06-01), Mine
patent: D317774 (1991-06-01), Mizushima
patent: D318058 (1991-07-01), Koide
patent: D320032 (1991-09-01), Hoshina
patent: D320033 (1991-09-01), Hoshina
patent: D322268 (1991-12-01), Yamawaki
patent: D322269 (1991-12-01), Yamawaki
patent: D325597 (1992-04-01), Sakagami
patent: D345369 (1994-03-01), Ito
patent: D345371 (1994-03-01), Ito
patent: 4635521 (1987-01-01), Bellini
patent: 4653375 (1987-03-01), Honda et al.
Music Trades, Apr., 1989 p. 24 (Yamaha's DSR-2000).

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