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发明名称
Telephone system
摘要
申请公布号
US1783312(A)
申请公布日期
1930.12.02
申请号
US19260140448
申请日期
1926.10.09
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
SCHULZ WERNER;FRISCHKE MAX;SCHIFFMANN KARL
分类号
H04M5/08
主分类号
H04M5/08
代理机构
代理人
主权项
地址
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