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经营范围
发明名称
Sound reproducing apparatus
摘要
申请公布号
US2038253(A)
申请公布日期
1936.04.21
申请号
US19350015546
申请日期
1935.04.10
申请人
HASELTINE CORPORATION
发明人
WHEELER HAROLD A.;SWINYARD WILLIAM O.
分类号
H04R1/34
主分类号
H04R1/34
代理机构
代理人
主权项
地址
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