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经营范围
发明名称
Telephone repeating coil
摘要
申请公布号
US1792616(A)
申请公布日期
1931.02.17
申请号
US19280244807
申请日期
1928.01.06
申请人
TELEPHON-APPARAT-FABRIK E. ZWIETUSCH & CO. G.M.B.H.
发明人
TAUCHMANN GEORG;REENTS ERICH
分类号
H04M1/02
主分类号
H04M1/02
代理机构
代理人
主权项
地址
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