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发明名称
Telltale device
摘要
申请公布号
US2127753(A)
申请公布日期
1938.08.23
申请号
US19360110835
申请日期
1936.11.14
申请人
EXHIBIT SUPPLY COMPANY
发明人
RADTKE BRUNO
分类号
G07F17/38
主分类号
G07F17/38
代理机构
代理人
主权项
地址
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