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发明名称
Einrichtung an Bestuhlungen zum Kenntlichmachen unbesetzter Plätze in verdunkelten Räumen.
摘要
申请公布号
CH141708(A)
申请公布日期
1930.08.15
申请号
CHD141708
申请日期
1929.07.30
申请人
SCHAEUFELE,ALFRED
发明人
SCHAEUFELE,ALFRED
分类号
G09F3/00
主分类号
G09F3/00
代理机构
代理人
主权项
地址
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