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经营范围
发明名称
Circuit arrangement for a subscriber's set of a telegraph system
摘要
申请公布号
US2535652(A)
申请公布日期
1950.12.26
申请号
US19470767522
申请日期
1947.07.30
申请人
OBERMAN ROELOF M M
发明人
OBERMAN ROELOF M. M.
分类号
B29C65/02;H04L12/02
主分类号
B29C65/02
代理机构
代理人
主权项
地址
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