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发明名称
Sound radiator
摘要
申请公布号
US1792536(A)
申请公布日期
1931.02.17
申请号
US19280320333
申请日期
1928.11.19
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HARRISON HENRY C.
分类号
G10K11/02
主分类号
G10K11/02
代理机构
代理人
主权项
地址
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