Chord teaching card

Details Chord teaching card Chord teaching card

1988-10-28

1992-06-23

Ansher, Bernard

Musical instruments

Miscellaneous

D19 59

Patent

active

D03272885

REFERENCES:
patent: 2881662 (1959-04-01), Harris
patent: 4559861 (1985-12-01), Patty et al.
patent: 4712464 (1987-12-01), Nance
patent: 4791848 (1988-12-01), Blum, Jr.
patent: 4813902 (1989-03-01), Messer
patent: 4825572 (1989-05-01), Robbins et al.

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