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经营范围
发明名称
Telephonsystem
摘要
申请公布号
DE506166(C)
申请公布日期
1930.09.03
申请号
DE1926A048055D
申请日期
1926.06.22
申请人
AMERICAN TELECHRONOMETER COMPANY
发明人
分类号
H04M15/28
主分类号
H04M15/28
代理机构
代理人
主权项
地址
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