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发明名称
Telephone receiver
摘要
申请公布号
US1830160(A)
申请公布日期
1931.11.03
申请号
US19280262618
申请日期
1928.03.19
申请人
FRENCH ELECTRIC COMPANY
发明人
FRENCH GEORGE B.;SPENCE JESSE L.
分类号
H04R13/02
主分类号
H04R13/02
代理机构
代理人
主权项
地址
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