Title:
Protective hearing aid
United States Patent 3306991
Inventors:
Wood, Homer J.
Publication Date:
02/28/1967
Export Citation:
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Assignee:
Wood, Homer J.
Primary Class:
381/72
Other Classes:
381/322, 381/371
International Classes:
H04R25/00; H04R25/00
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US Patent References:
3160717Ear protectors
3124760N/A
3098121Automatic sound control
2946862Ear protector and communication equipment
2946860Headset
1182896N/A
1087704N/A