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发明名称
Improvements in or relating to telephone transmitters
摘要
申请公布号
GB423257(A)
申请公布日期
1935.01.29
申请号
GB19330027185
申请日期
1933.10.03
申请人
SIEMENS BROTHERS & CO. LIMITED;GEORGE WILLIAM SUTTON
发明人
分类号
H04R1/22
主分类号
H04R1/22
代理机构
代理人
主权项
地址
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