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发明名称
Trip movement for watchmen's patrol boxes
摘要
申请公布号
US2522933(A)
申请公布日期
1950.09.19
申请号
US19490107355
申请日期
1949.07.28
申请人
ENGELMANN ERNEST C
发明人
ENGELMANN ERNEST C.
分类号
F16P1/00
主分类号
F16P1/00
代理机构
代理人
主权项
地址
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