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发明名称
Sound translating device
摘要
申请公布号
US1855600(A)
申请公布日期
1932.04.26
申请号
US19310553101
申请日期
1931.07.25
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
CLARKE HARRY R.
分类号
H04R9/04
主分类号
H04R9/04
代理机构
代理人
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