Protective hearing aid
United States Patent 3306991
US Patent References:
/1087704.html
- - 1087704

/1182896.html
- - 1182896

Headset
- - 2946860

Ear protector and communication equipment
- - 2946862

Automatic sound control
- - 3098121


Inventors:
Wood, Homer J.
Publication Date:
02/28/1967
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Assignee:
Wood, Homer J.
Primary Class:
381/72
Other Classes:
381/322, 381/371
International Classes:
H04R25/00
US Patent References:
3124760
3160717Ear protectors