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经营范围
发明名称
Commutateur des numéros pour appareils téléphoniques
摘要
申请公布号
FR713878(A)
申请公布日期
1931.11.04
申请号
FRD713878
申请日期
1931.03.26
申请人
TELEPHON-APPARAT-FABRIK, E. ZWIETUSCH & CO, G.M.B.H.
发明人
分类号
H04M1/32
主分类号
H04M1/32
代理机构
代理人
主权项
地址
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