Title:
ACOUSTICAL SYSTEMS FOR AIR MOVING DEVICES
United States Patent 3540547

Inventors:
Coward Jr., Charles Waddell
Publication Date:
11/17/1970
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Assignee:
Charles Jr., Waddell Coward
Primary Class:
181/225
International Classes:
F04D29/66; F01N1/10; F04B39/12




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