Title:
Audiometer for air and bone conducting receivers having a scale with a single zero hearing loss reference
Document Type and Number:
United States Patent 2471136

Inventors:
Allison, Ralph E.
Publication Date:
05/24/1949
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Assignee:
PATENT MAN INC
Primary Class:
73/585
International Classes:
A61B5/12
US Patent References:
2052167Audiometer
2072705Hearing testing
2257262Audiometer
2257263Audiometer
2310588Audiometer


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