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发明名称
Elektromagnetische Einrichtung, insbesondere für elektrische Schauzeichen.
摘要
申请公布号
CH143857(A)
申请公布日期
1930.11.30
申请号
CHD143857
申请日期
1929.11.29
申请人
BELL TELEPHONE MANUFACTURING CO.
发明人
CO. BELL TELEPHONE MANUFACTURING
分类号
主分类号
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代理人
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地址
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