Musical instruments – Keyboard type
Patent
1991-06-11
1993-12-21
Ansher, Bernard
Musical instruments
Keyboard type
Patent
active
D03425436
REFERENCES:
patent: D186409 (1959-10-01), Pratt
patent: D193360 (1962-08-01), Pratt
patent: D249295 (1978-09-01), Pinkins, Jr.
patent: D252112 (1979-06-01), Legnasky et al.
patent: D273802 (1984-05-01), Bousman
patent: 2812681 (1957-11-01), Carron
patent: 4744280 (1988-05-01), Garritano
Ansher Bernard
Hyder Philip
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