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经营范围
发明名称
Signaling apparatus
摘要
申请公布号
US1844205(A)
申请公布日期
1932.02.09
申请号
US19270175377
申请日期
1927.03.14
申请人
COLMAN HOWARD D
发明人
COLMAN HOWARD D.
分类号
G08C19/16
主分类号
G08C19/16
代理机构
代理人
主权项
地址
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