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发明名称
Recording apparatus
摘要
申请公布号
US2501079(A)
申请公布日期
1950.03.21
申请号
US19460666261
申请日期
1946.05.01
申请人
A. C. NIELSEN COMPANY
发明人
NIELSEN ARTHUR C.
分类号
G07C11/00
主分类号
G07C11/00
代理机构
代理人
主权项
地址
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