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发明名称
Mailbox signal
摘要
申请公布号
US2217310(A)
申请公布日期
1940.10.08
申请号
US19390304016
申请日期
1939.11.13
申请人
FATUR JAMES I
发明人
FATUR JAMES I.
分类号
A47G29/122
主分类号
A47G29/122
代理机构
代理人
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