Musical instruments – Keyboard type
Patent
1978-07-10
1980-08-12
Stearman, Joel
Musical instruments
Keyboard type
D17 2, D17 14, D1701
Patent
active
D02563665
REFERENCES:
patent: D211133 (1968-05-01), Holly
patent: D220650 (1971-05-01), Pozanovich
patent: 3541912 (1970-11-01), Radke
patent: 3555166 (1971-01-01), Gasser
patent: 4078464 (1978-03-01), Sugiyama
Corrigan Jane E.
Schroeder Everett J.
Stearman Joel
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