Musical tuning instrument
United States Patent 2207450

Inventors:
Bergan, Kenneth N.
Skarshaug, Wallace O.
Publication Date:
07/09/1940
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Assignee:
Bergan, Kenneth N.
Skarshaug, Wallace O.
Primary Class:
84/454
Other Classes:
84/DIG.006, 84/DIG.018, 984/353
International Classes:
G10H1/44