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发明名称
Microtelephone
摘要
申请公布号
US1760566(A)
申请公布日期
1930.05.27
申请号
US19290337057
申请日期
1929.02.02
申请人
THE FIRM FULD & CO., TELEPHON UND TELEGRAPHENWERKE A. G.
发明人
SCHNEIDER JOHANN;HECKMANN GEORG
分类号
H04M1/03
主分类号
H04M1/03
代理机构
代理人
主权项
地址
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