Title:
Electroacoustic transducer
United States Patent 3222462

Inventors:
Richard, Karmann
Helmut, Hoffmann
Otto, Brunnert
Publication Date:
12/07/1965
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Assignee:
SIEMENS AG
Primary Class:
381/426
Other Classes:
310/334, 310/331
International Classes:
G10K9/122; H04R7/18; H04R7/22; H04R17/00; G10K9/00; H04R7/00
Other References:
None