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发明名称
PHOTOGRAPHIC ENLARGING EASEL
摘要
申请公布号
US3622240(A)
申请公布日期
1971.11.23
申请号
USD3622240
申请日期
1969.08.14
申请人
NIKOR PRODUCTS CO. INC.
发明人
HINSDALE SMITH JR.
分类号
G03B27/58;(IPC1-7):G03B27/58
主分类号
G03B27/58
代理机构
代理人
主权项
地址
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