Title:
Transducer
United States Patent 2864899


Inventors:
Parker, Henry W.
Application Number:
US47180754A
Publication Date:
12/16/1958
Filing Date:
11/29/1954
Assignee:
Parker, Henry W.
Primary Class:
International Classes:
H04R19/02
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Foreign References:
GB251349A1926-04-30
GB326602A1930-03-20
GB387546A1933-02-09