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经营范围
发明名称
Signaling apparatus
摘要
申请公布号
US2171665(A)
申请公布日期
1939.09.05
申请号
US19380206637
申请日期
1938.05.07
申请人
FRANK J. SINGER;LEO W. STEINER
发明人
MELTZER JESSIE
分类号
A61G7/05
主分类号
A61G7/05
代理机构
代理人
主权项
地址
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