Title:
Cushion mounting for mass impedance resonance filter
United States Patent 2717596
Inventors:
Knight, John S.
Publication Date:
09/13/1955
Export Citation:
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Assignee:
Knight, John S.
Primary Class:
128/867
International Classes:
A61F11/08; A61F11/00
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US Patent References:
2427664Hearing guard and ear protector