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摘要
申请公布号
US1903707(A)
申请公布日期
1933.04.11
申请号
US19300469865
申请日期
1930.07.22
申请人
TELEPHON- UND TELEGRAPHENFABRIKS-A. G. KAPSCH U. SOHNE
发明人
PAREL KARL
分类号
H04M1/03
主分类号
H04M1/03
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