Title:
DUAL-BELL TRUMPET OR SIMILAR-TYPE HORN
United States Patent 3529505

Inventors:
Brooks, Julius E.
Publication Date:
09/22/1970
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Assignee:
Julius, Brooks E.
Primary Class:
84/387R
Other Classes:
984/135
International Classes:
G10D7/10; G10D7/00; G10D7/10




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