Electronic keyboard musical instrument

Musical instruments – Keyboard type

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D17 5

Patent

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D03453707

REFERENCES:
patent: D312651 (1990-12-01), Yamawaki
patent: D313035 (1990-12-01), Katsuhara et al.
patent: D322800 (1991-12-01), Yun
patent: D325213 (1992-04-01), Mizushima
patent: D325214 (1992-04-01), Hoshina
patent: D325596 (1992-04-01), Sakagami
patent: D326106 (1992-05-01), Tatshumi
patent: D326107 (1992-05-01), Amiya
patent: D326468 (1992-05-01), Jeon
patent: 5157213 (1992-10-01), Kashio et al.
Music Trades, Feb. 1989 p. 62 (Peavey's Keyboard).

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