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发明名称
Notrufeinrichtung als Zusatzeinrichtung für Fernsprechanlagen
摘要
申请公布号
AT176595(B)
申请公布日期
1953.11.10
申请号
ATD176595
申请日期
1949.09.29
申请人
HANS REICHERT
发明人
HANS REICHERT
分类号
主分类号
代理机构
代理人
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