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发明名称
Electric signaling system
摘要
申请公布号
US2367258(A)
申请公布日期
1945.01.16
申请号
US19420468625
申请日期
1942.12.11
申请人
FREDERICK BATES ERNEST
发明人
BATES ERNEST FREDERICK
分类号
G08B17/06;G08B29/06
主分类号
G08B17/06
代理机构
代理人
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