Title:
INTERCHANGEABLE STRINGED INSTRUMENT
United States Patent 3538807

Inventors:
Francis, Louis
Publication Date:
11/10/1970
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Assignee:
Louis, Francis
Primary Class:
84/267
Other Classes:
84/293, 84/743, 84/314R
International Classes:
G10D1/08; G10D1/00; G10D1/08; G10D3/06




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