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发明名称
Wartedauer-Anzeigevorrichtung für Telephonzellen.
摘要
申请公布号
AT124846(B)
申请公布日期
1931.10.10
申请号
ATD124846
申请日期
1930.07.16
申请人
TEZELLA GESELLSCHAFT M. B. H.
发明人
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主分类号
代理机构
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