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发明名称
Sheet holder
摘要
申请公布号
US2302568(A)
申请公布日期
1942.11.17
申请号
US19410397225
申请日期
1941.06.09
申请人
FRED PITT
发明人
PITT WILLIAM PERCIVAL
分类号
B42F9/00
主分类号
B42F9/00
代理机构
代理人
主权项
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