Musical instruments – Keyboard type – Element or attachment
Patent
1990-05-21
1993-06-15
Bullock, B. J.
Musical instruments
Keyboard type
Element or attachment
D17 20
Patent
active
D03364860
REFERENCES:
patent: D74174 (1928-01-01), Hall
patent: D74317 (1928-01-01), Petterson
patent: D220650 (1971-05-01), Poznanovich
patent: D256366 (1980-08-01), Dworsky
patent: D258216 (1981-02-01), Eventoff
patent: D278154 (1985-03-01), Baker
patent: D278632 (1985-04-01), Erlewine
patent: D281700 (1985-12-01), Egnatski
patent: 2023358 (1935-12-01), Porter
patent: 3769871 (1973-11-01), Cawthorn
patent: 4235141 (1980-11-01), Eventoff
patent: 4339979 (1982-07-01), Norman
Musical Instruments, National Museums of Canada, 1984 p. 183.
Musical Instruments, National Museums of Canada, 1984 p. 181.
Aronovich Adir
Bullock B. J.
Gilliam Frank D.
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