Title:
Ear plugs
United States Patent 3047089
US Patent References:
Earpiece
- - 1733579

Audiphone
- - 1753817

Ear defender
- - 2437490

Ear insert for earphones
- - 2487038

Ear cushion with earplug
- - 2513985


Inventors:
Zwislocki, Jozef J.
Publication Date:
07/31/1962
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Assignee:
Univ, Syracuse
Primary Class:
181/135
Other Classes:
128/864, 381/380
International Classes:
H02M7/5375
US Patent References:
2719523Ear protector
2801423Ear defender
Foreign References:
DE843883C
NO90151A