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发明名称
Telephone transmitter
摘要
申请公布号
US2140859(A)
申请公布日期
1938.12.20
申请号
US19370180152
申请日期
1937.12.16
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
SOLDAN OTTO;PANZERBIETER HANS;JORGENSEN BERNHARD
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
地址
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