Title:
Hearing aid
United States Patent 3408461
US Patent References:
/0871470.html
- - 0871470
Ear mounted hearing aid device
- - 2874231
Hearing aid plastic ear pieces
- - 2939923
/3126977.html
- - 3126977
Hearing aid
- - 3170046
/0871470.html
- - 0871470
Ear mounted hearing aid device
- - 2874231
Hearing aid plastic ear pieces
- - 2939923
/3126977.html
- - 3126977
Hearing aid
- - 3170046
Inventors:
Langford, Byron G.
Publication Date:
10/29/1968
View Patent Images:
Export Citation:
Assignee:
ROYAL INDUSTRIES
Primary Class:
Other Classes:
381/328
International Classes:
H04R25/00; H04R25/02