Music teaching device

Details Music teaching device Music teaching device

1986-04-11

1989-08-08

Dunkins, Bruce W.

Office supplies; artists and teachers materials

Teaching material

Demonstrator or exhibitor

D19 59

Patent

active

D03027015

REFERENCES:
patent: D205401 (1966-08-01), Schmoyer
patent: D247119 (1978-01-01), Nilsson
patent: 1236339 (1917-08-01), Mills
patent: 3733956 (1973-05-01), Leonard
Piano Trade Magazine, Oct. 1959, p. 48, See Chord A Matic, upper right corner.

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