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发明名称
Elektrische Signalanlage zum Rufen von Personen
摘要
申请公布号
DE728456(C)
申请公布日期
1942.11.30
申请号
DE1941S144629D
申请日期
1941.03.26
申请人
SIEMENS & HALSKE AG.
发明人
LUNDBERG DIPL.-ING. BOERJE
分类号
G08B5/22
主分类号
G08B5/22
代理机构
代理人
主权项
地址
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