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发明名称
Day and night message conveyer
摘要
申请公布号
US2370150(A)
申请公布日期
1945.02.27
申请号
US19430489957
申请日期
1943.06.07
申请人
DIRCKSEN ARNOLD D
发明人
DIRCKSEN ARNOLD D.
分类号
B64D1/02
主分类号
B64D1/02
代理机构
代理人
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地址
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