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经营范围
发明名称
Sound reproducing diaphragm
摘要
申请公布号
US1834291(A)
申请公布日期
1931.12.01
申请号
US19270230642
申请日期
1927.11.02
申请人
BRANDES LABORATORIES, INC.
发明人
RYPINSKI MAURICE C.
分类号
H04R7/16
主分类号
H04R7/16
代理机构
代理人
主权项
地址
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