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发明名称
Postage stamp-examining appliance
摘要
申请公布号
US2881656(A)
申请公布日期
1959.04.14
申请号
US19570671758
申请日期
1957.07.15
申请人
ALEXANDER SUTTER
发明人
SUTTER ALEXANDER
分类号
G02B27/02
主分类号
G02B27/02
代理机构
代理人
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