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发明名称
Acoustic device
摘要
申请公布号
US2356262(A)
申请公布日期
1944.08.22
申请号
US19400350741
申请日期
1940.08.03
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
MOTT EDWARD E.
分类号
H04R13/00
主分类号
H04R13/00
代理机构
代理人
主权项
地址
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