Ear plug
United States Patent 2876767
US Patent References:
/1016877.html
- - 1016877


Inventors:
Nathan, Wasserman
Publication Date:
03/10/1959
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Assignee:
Nathan, Wasserman
Primary Class:
128/865
Other Classes:
604/99.020, D24/106
International Classes:
A61F11/10; A61F11/00
Foreign References:
GB188503239A
DE268345C
DE837297C