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发明名称
Safety signal
摘要
申请公布号
US1773346(A)
申请公布日期
1930.08.19
申请号
US19270225057
申请日期
1927.10.10
申请人
COLLINS THOMAS E
发明人
COLLINS THOMAS E.
分类号
G09F13/16
主分类号
G09F13/16
代理机构
代理人
主权项
地址
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